name
large_stringclasses 12
values | year
large_stringclasses 2
values | category
large_stringclasses 6
values | qid
int64 1
235
| qtext
large_stringlengths 5
1.24k
| ra
int64 1
5
| answers
large list |
---|---|---|---|---|---|---|
Cuaderno_2013_1_B | 2013 | biology | 105 | In a pedigree of an autosomal dominant trait it is observed that: | 2 | [
{
"aid": 1,
"atext": "The trait appears more frequently in males."
},
{
"aid": 2,
"atext": "The unaffected people do not transmit the trait."
},
{
"aid": 3,
"atext": "The trait tends to skip generations."
},
{
"aid": 4,
"atext": "The affected people have both affected parents."
},
{
"aid": 5,
"atext": "The trait tends to appear in the progeny of related parents."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 106 | In mitosis, the nuclear membrane disintegrates and spindle microtubules bind to the kinetochores in: | 2 | [
{
"aid": 1,
"atext": "Cytokinesis"
},
{
"aid": 2,
"atext": "Prometaphase."
},
{
"aid": 3,
"atext": "Metaphase"
},
{
"aid": 4,
"atext": "Interface."
},
{
"aid": 5,
"atext": "Prophase."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 107 | Has a dominant inheritance linked to the X chromosome the: | 5 | [
{
"aid": 1,
"atext": "Duchenne muscular dystrophy."
},
{
"aid": 2,
"atext": "Fabry disease."
},
{
"aid": 3,
"atext": "Huntington's Korea."
},
{
"aid": 4,
"atext": "Cystic fibrosis."
},
{
"aid": 5,
"atext": "Rett syndrome."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 108 | Has an autosomal dominant inheritance: | 2 | [
{
"aid": 1,
"atext": "Alcaptonuria."
},
{
"aid": 2,
"atext": "Huntington's Korea."
},
{
"aid": 3,
"atext": "Rett syndrome."
},
{
"aid": 4,
"atext": "Colour blindness."
},
{
"aid": 5,
"atext": "Duchenne muscular dystrophy."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 109 | The number of Barr corpuscles of the cells of a man with karyotype 48, XXXY is: | 1 | [
{
"aid": 1,
"atext": "two."
},
{
"aid": 2,
"atext": "one."
},
{
"aid": 3,
"atext": "0"
},
{
"aid": 4,
"atext": "3."
},
{
"aid": 5,
"atext": "Four."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 110 | The type of epistasia that explains the 15: 1 dihybrid phenotypic ratio is: | 1 | [
{
"aid": 1,
"atext": "Double dominant."
},
{
"aid": 2,
"atext": "Simple recessive"
},
{
"aid": 3,
"atext": "Recessive dominant double."
},
{
"aid": 4,
"atext": "Double recessive"
},
{
"aid": 5,
"atext": "Simple dominant."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 111 | To calculate the number of different genotypes in any allelic series the formula is applied: | 2 | [
{
"aid": 1,
"atext": "(n-1) / 2."
},
{
"aid": 2,
"atext": "n x (n + 1) / 2."
},
{
"aid": 3,
"atext": "n x (n-1) / 2."
},
{
"aid": 4,
"atext": "(n-1) x (n + 1) / 2."
},
{
"aid": 5,
"atext": "(2n-1) / 2."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 112 | The change corresponds to a change mutation: | 2 | [
{
"aid": 1,
"atext": "T → C."
},
{
"aid": 2,
"atext": "A → T."
},
{
"aid": 3,
"atext": "G → A."
},
{
"aid": 4,
"atext": "C → T."
},
{
"aid": 5,
"atext": "A → G."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 113 | The order of the stages of the cell cycle is: | 5 | [
{
"aid": 1,
"atext": "S, G1, Mitosis, G2."
},
{
"aid": 2,
"atext": "G2, G1, S, Mitosis."
},
{
"aid": 3,
"atext": "G1, Mitosis, G2, S."
},
{
"aid": 4,
"atext": "S, G0, Mitosis, G1."
},
{
"aid": 5,
"atext": "G1, S, G2, Mitosis."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 114 | How many chromosomes would a male with nulisomy have for chromosomes 17 and 18? | 4 | [
{
"aid": 1,
"atext": "43"
},
{
"aid": 2,
"atext": "Four. Five."
},
{
"aid": 3,
"atext": "44"
},
{
"aid": 4,
"atext": "42"
},
{
"aid": 5,
"atext": "40"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 115 | It is NOT associated with defects in DNA repair the: | 5 | [
{
"aid": 1,
"atext": "Fanconi anemia."
},
{
"aid": 2,
"atext": "Li-Fraumeni syndrome."
},
{
"aid": 3,
"atext": "Bloom syndrome."
},
{
"aid": 4,
"atext": "Xeroderma pigmentosa."
},
{
"aid": 5,
"atext": "Sickle-cell anemia"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 116 | The denaturing of proteins: | 4 | [
{
"aid": 1,
"atext": "Alters the native conformation without affecting the biological activity."
},
{
"aid": 2,
"atext": "It is always irreversible."
},
{
"aid": 3,
"atext": "It can only be achieved by treatment with strong acids."
},
{
"aid": 4,
"atext": "It does not affect the primary structure."
},
{
"aid": 5,
"atext": "It produces the hydrolysis of the protein."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 117 | In relation to the structure of proteins: | 4 | [
{
"aid": 1,
"atext": "All globular proteins have the same domains."
},
{
"aid": 2,
"atext": "The tertiary structure is present only in oligomeric proteins."
},
{
"aid": 3,
"atext": "Hemoglobin is the only protein that has a quaternary structure."
},
{
"aid": 4,
"atext": "The protein domains are regions of compact folding that exert a certain function."
},
{
"aid": 5,
"atext": "The tertiary and quaternary structures are maintained only by the peptide bonds."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 118 | Regarding enzymatic cofactors: | 4 | [
{
"aid": 1,
"atext": "All enzymes are required to be active."
},
{
"aid": 2,
"atext": "Its binding to the enzyme is always covalent."
},
{
"aid": 3,
"atext": "There are no two enzymes that use the same cofactor."
},
{
"aid": 4,
"atext": "They can be metal ions."
},
{
"aid": 5,
"atext": "They only have structural function."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 119 | In relation to enzymatic inhibition: | 5 | [
{
"aid": 1,
"atext": "An irreversible inhibitor causes the denaturation of the enzyme."
},
{
"aid": 2,
"atext": "The competing inhibitors bind to the substrate of the reaction."
},
{
"aid": 3,
"atext": "A non-competitive inhibitor does not need to bind to the enzyme to exert its activity."
},
{
"aid": 4,
"atext": "All inhibitors modify Vmax."
},
{
"aid": 5,
"atext": "A competitive inhibitor increases the value of Km."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 120 | Sulfur contains the side chain of: | 3 | [
{
"aid": 1,
"atext": "Lysine"
},
{
"aid": 2,
"atext": "Tryptophan"
},
{
"aid": 3,
"atext": "Cysteine"
},
{
"aid": 4,
"atext": "Serina"
},
{
"aid": 5,
"atext": "To the girl."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 121 | It contains an imidazole group the side chain of: | 4 | [
{
"aid": 1,
"atext": "Arginine"
},
{
"aid": 2,
"atext": "Tyrosine"
},
{
"aid": 3,
"atext": "Glutamine"
},
{
"aid": 4,
"atext": "Histidine"
},
{
"aid": 5,
"atext": "Lysine"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 122 | The pentose phosphate pathway produces: | 2 | [
{
"aid": 1,
"atext": "NADH and acetyl-CoA."
},
{
"aid": 2,
"atext": "NADPH and ribose-5-phosphate."
},
{
"aid": 3,
"atext": "NADH and ribose-5-phosphate."
},
{
"aid": 4,
"atext": "Urea."
},
{
"aid": 5,
"atext": "Ribulose-1,5-bisphosphate."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 123 | The oxygen we consume in the respiratory chain is transformed into: | 4 | [
{
"aid": 1,
"atext": "Acetyl-CoA."
},
{
"aid": 2,
"atext": "Carbon dioxide."
},
{
"aid": 3,
"atext": "Carbon monoxide."
},
{
"aid": 4,
"atext": "Water."
},
{
"aid": 5,
"atext": "Carbonic acid."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 124 | When an enzyme catalyzes a reaction: | 1 | [
{
"aid": 1,
"atext": "It is not modified and can be reused."
},
{
"aid": 2,
"atext": "It does not change, but it loses its activity."
},
{
"aid": 3,
"atext": "It always requires the participation of cofactors."
},
{
"aid": 4,
"atext": "It denatures to facilitate bonding with the substrate."
},
{
"aid": 5,
"atext": "It always requires energy."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 125 | The maximum speed of an enzymatic reaction: | 2 | [
{
"aid": 1,
"atext": "It depends on the substrate concentration."
},
{
"aid": 2,
"atext": "It depends on the enzyme concentration."
},
{
"aid": 3,
"atext": "It doubles when duplicating the substrate concentration."
},
{
"aid": 4,
"atext": "It is Km / 2."
},
{
"aid": 5,
"atext": "It is the same for all enzymes."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 126 | The ketone bodies: | 4 | [
{
"aid": 1,
"atext": "They are used by the liver to synthesize fatty acids."
},
{
"aid": 2,
"atext": "They only form in conditions of good nutrition."
},
{
"aid": 3,
"atext": "Its formation is especially active in skeletal muscle."
},
{
"aid": 4,
"atext": "It is formed from acetyl-CoA."
},
{
"aid": 5,
"atext": "They never give acetone."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 127 | In general, allosteric enzymes: | 4 | [
{
"aid": 1,
"atext": "They link the effectors in the active center."
},
{
"aid": 2,
"atext": "They form covalent bonds with their negative effectors."
},
{
"aid": 3,
"atext": "They originate hyperbolic curves of speed before the concentration of substrate."
},
{
"aid": 4,
"atext": "They change their conformation when they link effectors."
},
{
"aid": 5,
"atext": "They are irreversibly modified when they are inhibited."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 128 | It is completely oxidized in the citric acid cycle: | 4 | [
{
"aid": 1,
"atext": "-ketoglutarate."
},
{
"aid": 2,
"atext": "Succinate"
},
{
"aid": 3,
"atext": "Citrate."
},
{
"aid": 4,
"atext": "Acetyl-CoA."
},
{
"aid": 5,
"atext": "Oxalacetate."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 129 | Animals can NOT synthesize glucose from: | 3 | [
{
"aid": 1,
"atext": "Glycerol."
},
{
"aid": 2,
"atext": "To the girl."
},
{
"aid": 3,
"atext": "Palmitate"
},
{
"aid": 4,
"atext": "Oxalacetate."
},
{
"aid": 5,
"atext": "Lactate"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 130 | Pyruvate carboxylase: | 1 | [
{
"aid": 1,
"atext": "It requires biotin."
},
{
"aid": 2,
"atext": "Use a methyl group activated as a carbon source."
},
{
"aid": 3,
"atext": "It catalyzes the production of acetyl-CoA and carbon dioxide."
},
{
"aid": 4,
"atext": "It is activated in the muscle during the Cori cycle."
},
{
"aid": 5,
"atext": "It is an intermediate of the citric acid cycle."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 131 | The Cori cycle: | 5 | [
{
"aid": 1,
"atext": "It involves the synthesis and degradation of glycogen."
},
{
"aid": 2,
"atext": "It does not imply the conversion of lactate into pyruvate."
},
{
"aid": 3,
"atext": "It only takes place in the liver."
},
{
"aid": 4,
"atext": "Oxidizes tricarboxylic acids."
},
{
"aid": 5,
"atext": "It involves glycolysis and gluconeogenesis."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 132 | It is activated when cyclic AMP joins the: | 2 | [
{
"aid": 1,
"atext": "Adenylate cyclase."
},
{
"aid": 2,
"atext": "Protein kinase A."
},
{
"aid": 3,
"atext": "Glycogen phosphorylase kinase."
},
{
"aid": 4,
"atext": "Pyruvate kinase."
},
{
"aid": 5,
"atext": "Phosphofruct kinase 1."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 133 | The enantiomers of a molecule are: | 3 | [
{
"aid": 1,
"atext": "Very different in all its chemical and physical properties."
},
{
"aid": 2,
"atext": "Superimposed mirror images."
},
{
"aid": 3,
"atext": "Distinguishable by their optical activity."
},
{
"aid": 4,
"atext": "The result of the cyclization of a molecule in different positions."
},
{
"aid": 5,
"atext": "Interconvertible without rupture of covalent bonds."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 134 | The forces that stabilize the alpha helix are: | 1 | [
{
"aid": 1,
"atext": "Intra-chain hydrogen bridges parallel to the axis of the helix."
},
{
"aid": 2,
"atext": "Disulfide bridges between methionines."
},
{
"aid": 3,
"atext": "Hydrogen bridges between chains perpendicular to the axis of the helix."
},
{
"aid": 4,
"atext": "Van der Waals forces among the radicals."
},
{
"aid": 5,
"atext": "Links between lysine radicals."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 136 | The phosphate groups of the nucleotides: | 5 | [
{
"aid": 1,
"atext": "They are stabilized by binding to divalent anions."
},
{
"aid": 2,
"atext": "They form low-energy hydrolysis bonds."
},
{
"aid": 3,
"atext": "They are called X, Y and Z as they move away from ribose."
},
{
"aid": 4,
"atext": "They are attached to the C3' of the ribose."
},
{
"aid": 5,
"atext": "They present negative charge."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 137 | On the link between the nitrogenous base and the ribose of the nucleotides: | 2 | [
{
"aid": 1,
"atext": "The anomeric carbon of ribose is in alpha configuration."
},
{
"aid": 2,
"atext": "It is an N-glycosidic bond."
},
{
"aid": 3,
"atext": "It involves the C5' of the ribose."
},
{
"aid": 4,
"atext": "It involves phosphate groups."
},
{
"aid": 5,
"atext": "It is of a different nature for each nitrogenous base."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 138 | The phosphodiester bond: | 4 | [
{
"aid": 1,
"atext": "It is formed by attack from a nitrogenous base to a phosphate."
},
{
"aid": 2,
"atext": "It is formed using NMP as a substrate."
},
{
"aid": 3,
"atext": "In its training PPi is consumed."
},
{
"aid": 4,
"atext": "It involves an alpha phosphate of one nucleotide and an OH group of the ribose of another."
},
{
"aid": 5,
"atext": "It does not need enzymatic catalysis."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 139 | The tRNA-aminoacyl-transferases: | 4 | [
{
"aid": 1,
"atext": "They link the amino acid to the ribosome."
},
{
"aid": 2,
"atext": "They bind the amino acid to the anticodon of the tRNA."
},
{
"aid": 3,
"atext": "They are RNA polymerases."
},
{
"aid": 4,
"atext": "They guarantee the fidelity of the translation."
},
{
"aid": 5,
"atext": "They are not important in the translation."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 140 | In the translation of prokaryotes, the first tRNA: | 3 | [
{
"aid": 1,
"atext": "It is introduced in site A."
},
{
"aid": 2,
"atext": "Join a methylated amino acid."
},
{
"aid": 3,
"atext": "It is accompanied by the IF2 factor."
},
{
"aid": 4,
"atext": "It is paired with a UGA start codon."
},
{
"aid": 5,
"atext": "Always join serina."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 141 | On the synthesis of proteins it is correct to affirm that: | 2 | [
{
"aid": 1,
"atext": "Start at the carboxyl end."
},
{
"aid": 2,
"atext": "The mRNA is translated from the 5'-end to the 3'-end."
},
{
"aid": 3,
"atext": "In eukaryotes it takes place in the nucleus."
},
{
"aid": 4,
"atext": "The first subunit of the ribosome to bind to the mRNA is the largest."
},
{
"aid": 5,
"atext": "It does not consume energy."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 142 | In the Michaelis-Menten kinetics, when the values of [s] are much lower (<1/100) than the value of Km: | 2 | [
{
"aid": 1,
"atext": "We are in saturation kinetics."
},
{
"aid": 2,
"atext": "The kinetics is of order 1."
},
{
"aid": 3,
"atext": "The Vo is the Vmax."
},
{
"aid": 4,
"atext": "The speed is independent of the [s]."
},
{
"aid": 5,
"atext": "That situation never occurs."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 143 | Enzymatic regulation by phosphorylation: | 1 | [
{
"aid": 1,
"atext": "It is reversible."
},
{
"aid": 2,
"atext": "It requires enzymes that directly introduce the Pi."
},
{
"aid": 3,
"atext": "Introduce the Pi into acidic and basic amino acids."
},
{
"aid": 4,
"atext": "Always activate enzymes."
},
{
"aid": 5,
"atext": "It is carried out by phosphatases."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 145 | Glycogenesis: | 5 | [
{
"aid": 1,
"atext": "It is a very active pathway in all tissues."
},
{
"aid": 2,
"atext": "It is activated by insulin."
},
{
"aid": 3,
"atext": "All their reactions occur in the mitochondria."
},
{
"aid": 4,
"atext": "One of its substrates is ribose."
},
{
"aid": 5,
"atext": "It is produced in the liver."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 146 | In the urea cycle, the argininsuccinate: | 1 | [
{
"aid": 1,
"atext": "It generates fumarate and arginine by argininesuccinase."
},
{
"aid": 2,
"atext": "It has five amino groups in its structure."
},
{
"aid": 3,
"atext": "Its synthesis produces energy in the form of ATP."
},
{
"aid": 4,
"atext": "It is synthesized in the mitochondria."
},
{
"aid": 5,
"atext": "It is a keto acid."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 148 | Acetyl-CoA carboxylase: | 3 | [
{
"aid": 1,
"atext": "It is a mitochondrial enzyme."
},
{
"aid": 2,
"atext": "Its product is Succinyl-CoA."
},
{
"aid": 3,
"atext": "It requires biotin as a cofactor."
},
{
"aid": 4,
"atext": "Free ATP"
},
{
"aid": 5,
"atext": "Eat NADH."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 149 | Acetyl-CoA: | 4 | [
{
"aid": 1,
"atext": "It is synthesized from pyruvate in the eukaryotic cytoplasm."
},
{
"aid": 2,
"atext": "It has a phosphate bond rich in energy."
},
{
"aid": 3,
"atext": "Presents a guanine nucleotide in coenzyme A."
},
{
"aid": 4,
"atext": "Activates pyruvate carboxylase and inhibits pyruvate dehydrogenase."
},
{
"aid": 5,
"atext": "It easily crosses the mitochondrial inner membrane."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 150 | In the regulation of glycogen metabolism by adrenaline: | 3 | [
{
"aid": 1,
"atext": "Adenylate cyclase is inhibited."
},
{
"aid": 2,
"atext": "Protein kinase A is inhibited through cAMP."
},
{
"aid": 3,
"atext": "Glycogen synthetase is inhibited by phosphorylation."
},
{
"aid": 4,
"atext": "Glycogen phosphorylase is inhibited by phosphorylation."
},
{
"aid": 5,
"atext": "The main enzyme that carries it out is protein kinase C."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 151 | Diphyllobothrium latum competes with its definitive host for the vitamin: | 2 | [
{
"aid": 1,
"atext": "TO."
},
{
"aid": 2,
"atext": "B 12"
},
{
"aid": 3,
"atext": "C."
},
{
"aid": 4,
"atext": "D."
},
{
"aid": 5,
"atext": "AND."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 152 | Miltefosine and meglumine antimonate are used against: | 4 | [
{
"aid": 1,
"atext": "Plasmodium falciparum."
},
{
"aid": 2,
"atext": "Entamoeba histolytica."
},
{
"aid": 3,
"atext": "Fasciola hepatica."
},
{
"aid": 4,
"atext": "Leishmania"
},
{
"aid": 5,
"atext": "Trichinella spiralis."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 153 | Praziquantel is indicated against: | 3 | [
{
"aid": 1,
"atext": "Dicrocoelium dendriticum."
},
{
"aid": 2,
"atext": "Plasmodium."
},
{
"aid": 3,
"atext": "Taenia saginata."
},
{
"aid": 4,
"atext": "Toxoplasma gondii."
},
{
"aid": 5,
"atext": "Entamoeba histolytica."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 154 | The eggs are operculated: | 4 | [
{
"aid": 1,
"atext": "Hymenolepis nana."
},
{
"aid": 2,
"atext": "Trichinella spiralis."
},
{
"aid": 3,
"atext": "Enterobius vermicularis."
},
{
"aid": 4,
"atext": "Fasciola hepatica."
},
{
"aid": 5,
"atext": "Ascaris lumbricoides."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 155 | Miracidium is a larval phase that is part of the biological cycle of a: | 4 | [
{
"aid": 1,
"atext": "Pediculus"
},
{
"aid": 2,
"atext": "Ascaris"
},
{
"aid": 3,
"atext": "Oxiuro."
},
{
"aid": 4,
"atext": "Fluke."
},
{
"aid": 5,
"atext": "Phlebotomist"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 156 | The transmission of hepatitis E virus is via: | 1 | [
{
"aid": 1,
"atext": "Fecal-oral"
},
{
"aid": 2,
"atext": "Body secretions."
},
{
"aid": 3,
"atext": "Bloodline"
},
{
"aid": 4,
"atext": "Placenta."
},
{
"aid": 5,
"atext": "Aerial"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 157 | The genetic material of parvoviruses is: | 2 | [
{
"aid": 1,
"atext": "Double-stranded DNA"
},
{
"aid": 2,
"atext": "Single chain DNA"
},
{
"aid": 3,
"atext": "Single-stranded positive RNA"
},
{
"aid": 4,
"atext": "Single negative chain RNA."
},
{
"aid": 5,
"atext": "Double-stranded RNA"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 158 | They have helical symmetry in their capsid the: | 1 | [
{
"aid": 1,
"atext": "Rabies virus."
},
{
"aid": 2,
"atext": "Common cold virus."
},
{
"aid": 3,
"atext": "Papilomavirus."
},
{
"aid": 4,
"atext": "Herpesvirus."
},
{
"aid": 5,
"atext": "Adenovirus."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 159 | The genome of the hepatitis B virus is DNA from: | 5 | [
{
"aid": 1,
"atext": "Simple string (+)."
},
{
"aid": 2,
"atext": "Simple string (-)."
},
{
"aid": 3,
"atext": "Double circular chain."
},
{
"aid": 4,
"atext": "Double linear chain."
},
{
"aid": 5,
"atext": "Incomplete circular double chain (with notches)."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 160 | The retrovirus envelope comes from (the): | 1 | [
{
"aid": 1,
"atext": "Plasma membrane."
},
{
"aid": 2,
"atext": "Nuclear membrane."
},
{
"aid": 3,
"atext": "Endoplasmic reticulum."
},
{
"aid": 4,
"atext": "Golgi apparatus."
},
{
"aid": 5,
"atext": "Mitochondria."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 161 | The Baltimore system of virus classification is based on: | 3 | [
{
"aid": 1,
"atext": "The type of genetic material (DNA or RNA) they possess."
},
{
"aid": 2,
"atext": "The morphology of their virions."
},
{
"aid": 3,
"atext": "The replication of the genome and the synthesis process of its mRNA."
},
{
"aid": 4,
"atext": "The symmetry of the capsid."
},
{
"aid": 5,
"atext": "The presence or absence of wrapping."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 162 | They cause diarrhea in children: | 5 | [
{
"aid": 1,
"atext": "Togavirus."
},
{
"aid": 2,
"atext": "Coronavirus."
},
{
"aid": 3,
"atext": "Arenavirus."
},
{
"aid": 4,
"atext": "Parvovirus."
},
{
"aid": 5,
"atext": "Astrovirus"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 163 | The bodies of Negri are masses of viral particles visible under an optical microscope in cells infected by the virus: | 2 | [
{
"aid": 1,
"atext": "Smallpox"
},
{
"aid": 2,
"atext": "Anger."
},
{
"aid": 3,
"atext": "The polyoma."
},
{
"aid": 4,
"atext": "Yellow fever"
},
{
"aid": 5,
"atext": "Herpes"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 164 | The antiviral tamiflu that is used against the bird flu virus acts: | 1 | [
{
"aid": 1,
"atext": "Inhibiting viral neuraminidase."
},
{
"aid": 2,
"atext": "Inactivating the viral protease responsible for the processing of capsomere precursors."
},
{
"aid": 3,
"atext": "Preventing the decapsidation of viral particles."
},
{
"aid": 4,
"atext": "Blocking the interaction of viral particles with their cellular receptor."
},
{
"aid": 5,
"atext": "Altering the activity of the viral DNA polymerase."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 165 | The genetic material of the influenza virus is replicated in the: | 3 | [
{
"aid": 1,
"atext": "Lysosome"
},
{
"aid": 2,
"atext": "Cellular cytoplasm."
},
{
"aid": 3,
"atext": "Nucleus of the cell."
},
{
"aid": 4,
"atext": "Endosome"
},
{
"aid": 5,
"atext": "Golgi apparatus."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 166 | Immediately after the herpes virus decapsidation takes place: | 2 | [
{
"aid": 1,
"atext": "Synthesis of an own RNA polymerase."
},
{
"aid": 2,
"atext": "Circularization of its genome."
},
{
"aid": 3,
"atext": "Lysis of the endosome."
},
{
"aid": 4,
"atext": "Transcription of the viral DNA polymerase."
},
{
"aid": 5,
"atext": "Synthesis of a protein that inhibits the replication of the host cell."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 167 | The common cold virus has a genome: | 4 | [
{
"aid": 1,
"atext": "Single chain DNA"
},
{
"aid": 2,
"atext": "Double-stranded DNA"
},
{
"aid": 3,
"atext": "Fragmented."
},
{
"aid": 4,
"atext": "Simple chain RNA"
},
{
"aid": 5,
"atext": "Double-stranded RNA"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 168 | The most important causative agents of cervical cancer are: | 1 | [
{
"aid": 1,
"atext": "Papilomavirus."
},
{
"aid": 2,
"atext": "Polyomavirus"
},
{
"aid": 3,
"atext": "Retrovirus."
},
{
"aid": 4,
"atext": "Cytomegalovirus."
},
{
"aid": 5,
"atext": "Parvovirus."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 169 | They use a reverse transcriptase during their replication: | 3 | [
{
"aid": 1,
"atext": "Papovavirus."
},
{
"aid": 2,
"atext": "Polyomavirus"
},
{
"aid": 3,
"atext": "Hepadnavirus."
},
{
"aid": 4,
"atext": "Parvovirus."
},
{
"aid": 5,
"atext": "Herpesvirus."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 170 | The virus (virusoid) of hepatitis D (agent δ) needs to co-infect with the hepatitis virus: | 2 | [
{
"aid": 1,
"atext": "TO."
},
{
"aid": 2,
"atext": "B."
},
{
"aid": 3,
"atext": "C."
},
{
"aid": 4,
"atext": "AND."
},
{
"aid": 5,
"atext": "G."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 171 | Most Gram-positive bacteria do not grow in MacConkey's medium because it contains: | 1 | [
{
"aid": 1,
"atext": "Bile salts and crystal violet."
},
{
"aid": 2,
"atext": "Lactose and casein hydrolyzate."
},
{
"aid": 3,
"atext": "Neutral red"
},
{
"aid": 4,
"atext": "Mannitol"
},
{
"aid": 5,
"atext": "Basic fuchsin"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 172 | The immersion oil used for microscopic observation: | 3 | [
{
"aid": 1,
"atext": "Protects the sample from the oxidizing effect of air."
},
{
"aid": 2,
"atext": "Lubricate the objective lens."
},
{
"aid": 3,
"atext": "Reduces refraction and increases resolution."
},
{
"aid": 4,
"atext": "It acts as a lens that increases magnification."
},
{
"aid": 5,
"atext": "Avoid dehydration of the preparation."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 173 | To observe the bacterial capsules in a clear field microscope, a stain is made: | 4 | [
{
"aid": 1,
"atext": "Resistant acid"
},
{
"aid": 2,
"atext": "From Leifson."
},
{
"aid": 3,
"atext": "Simple."
},
{
"aid": 4,
"atext": "Negative."
},
{
"aid": 5,
"atext": "Differential."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 174 | The microbiocidal action of iodine and chlorine and many of its derivatives is due to: | 1 | [
{
"aid": 1,
"atext": "They are oxidizing agents."
},
{
"aid": 2,
"atext": "They bind specifically to the active centers of the enzymes."
},
{
"aid": 3,
"atext": "They bind specifically to ribosomal proteins."
},
{
"aid": 4,
"atext": "They induce pores in the membranes."
},
{
"aid": 5,
"atext": "They cause the dissolution of membrane phospholipids."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 175 | The bacteria contain endotoxins: | 3 | [
{
"aid": 1,
"atext": "Of all types except microplasmas."
},
{
"aid": 2,
"atext": "Gram positive."
},
{
"aid": 3,
"atext": "Gram negative"
},
{
"aid": 4,
"atext": "Intracellular"
},
{
"aid": 5,
"atext": "Endospore formers"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 176 | The O antigen used in the classification of Gram negative bacteria corresponds to: | 4 | [
{
"aid": 1,
"atext": "The flagellar proteins."
},
{
"aid": 2,
"atext": "Components of the capsule."
},
{
"aid": 3,
"atext": "The peptidoglycan."
},
{
"aid": 4,
"atext": "The polysaccharide of lipopolysaccharides."
},
{
"aid": 5,
"atext": "Plasma membrane proteins."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 177 | The alcohol-resistance acid is used to identify: | 3 | [
{
"aid": 1,
"atext": "Fermenting bacteria."
},
{
"aid": 2,
"atext": "Yeasts used in the production of alcoholic beverages."
},
{
"aid": 3,
"atext": "Bacteria that possess mycolic acids."
},
{
"aid": 4,
"atext": "Sporulated organisms."
},
{
"aid": 5,
"atext": "Oxidizing organisms from sulfides to sulfuric acid."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 178 | The Archaea differ from the bacteria in that: | 3 | [
{
"aid": 1,
"atext": "Their membranes have a single phospholipid layer."
},
{
"aid": 2,
"atext": "They have several chromosomes."
},
{
"aid": 3,
"atext": "Their membranes have glycerol ethers."
},
{
"aid": 4,
"atext": "They are not susceptible to viral infection."
},
{
"aid": 5,
"atext": "They do not have a cell wall."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 179 | Very commonly the autoinducer molecules responsible for the quorum perception of many Gram-negative bacteria are: | 1 | [
{
"aid": 1,
"atext": "N-acyl homoserine lactones."
},
{
"aid": 2,
"atext": "Diaminopimelic acid."
},
{
"aid": 3,
"atext": "Proteins"
},
{
"aid": 4,
"atext": "Hills"
},
{
"aid": 5,
"atext": "Fatty acids."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 180 | The most commonly used data to study the phylogenetic relationship between bacteria is: | 4 | [
{
"aid": 1,
"atext": "The cytosine-guanine composition of their DNA."
},
{
"aid": 2,
"atext": "The degree of DNA-DNA hybridization."
},
{
"aid": 3,
"atext": "The amino acid sequence of ribosomal proteins."
},
{
"aid": 4,
"atext": "The nucleotide sequence of 16S ribosomal RNA."
},
{
"aid": 5,
"atext": "The composition of the cell wall."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 181 | It usually protects the DNA of a restriction enzyme: | 1 | [
{
"aid": 1,
"atext": "Methylation of a nitrogenous base."
},
{
"aid": 2,
"atext": "Glycosylation of a nitrogenous base."
},
{
"aid": 3,
"atext": "Acetylation of deoxyribose."
},
{
"aid": 4,
"atext": "Phosphorylation of deoxyribose."
},
{
"aid": 5,
"atext": "Loss of one of the hydroxyl groups of phosphate."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 182 | An essential characteristic of plasmids is: | 4 | [
{
"aid": 1,
"atext": "Be able to integrate into the genome of the host cell."
},
{
"aid": 2,
"atext": "Direct the process of bacterial conjugation."
},
{
"aid": 3,
"atext": "Carry genes for antibiotic resistance."
},
{
"aid": 4,
"atext": "Replicate autonomously."
},
{
"aid": 5,
"atext": "Being circular DNA molecules."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 183 | The fermentation of glucose used by Escherichia coli is: | 5 | [
{
"aid": 1,
"atext": "Lactic"
},
{
"aid": 2,
"atext": "Propionic"
},
{
"aid": 3,
"atext": "Alcoholic"
},
{
"aid": 4,
"atext": "Butyric"
},
{
"aid": 5,
"atext": "Acid-mixed."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 184 | The target of the aminoglycoside antibacterials is the: | 3 | [
{
"aid": 1,
"atext": "DNA polymerase"
},
{
"aid": 2,
"atext": "Transpeptidation of peptidoglycan."
},
{
"aid": 3,
"atext": "30S subunit of the ribosome."
},
{
"aid": 4,
"atext": "RNA polymerase"
},
{
"aid": 5,
"atext": "DNA gyrase."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 185 | In the synthesis of DNA, the quinolones act: | 3 | [
{
"aid": 1,
"atext": "Joining the double helix and thus blocking the progress of the replication fork."
},
{
"aid": 2,
"atext": "Interlacing in the double helix and thus causing errors in the transcription."
},
{
"aid": 3,
"atext": "On DNA gyrase."
},
{
"aid": 4,
"atext": "As nucleotide analogs that are incorporated into DNA."
},
{
"aid": 5,
"atext": "About DNA polymerases."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 186 | Isoniazid is effective against: | 4 | [
{
"aid": 1,
"atext": "Brucella."
},
{
"aid": 2,
"atext": "Mycoplasma."
},
{
"aid": 3,
"atext": "Staphylococcus aureus."
},
{
"aid": 4,
"atext": "Mycobacterium tuberculosis."
},
{
"aid": 5,
"atext": "Bacillus anthracis."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 187 | A difference between the genus Vibrio and the enterobacteria is to be: | 2 | [
{
"aid": 1,
"atext": "Strict anaerobe."
},
{
"aid": 2,
"atext": "Halophile."
},
{
"aid": 3,
"atext": "Negative oxidase of peritric flogging."
},
{
"aid": 4,
"atext": "Very demanding nutritionally."
},
{
"aid": 5,
"atext": "Do not ferment glucose."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 189 | Cause of syphilis: | 3 | [
{
"aid": 1,
"atext": "Trichomonas vaginalis."
},
{
"aid": 2,
"atext": "Neisseria gonorrhoeae."
},
{
"aid": 3,
"atext": "Treponema pallidum."
},
{
"aid": 4,
"atext": "Mycoplasma genitalium."
},
{
"aid": 5,
"atext": "Mobiluncus curtisii."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 190 | They incorporate sterols to their plasma membrane: | 3 | [
{
"aid": 1,
"atext": "Mycobacterium tuberculosis."
},
{
"aid": 2,
"atext": "Micrococcus luteus."
},
{
"aid": 3,
"atext": "Mycoplasma pneumoniae"
},
{
"aid": 4,
"atext": "Chlamydia trachomatis."
},
{
"aid": 5,
"atext": "Rickettsia prowazekii."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 191 | The vaginal microbiota of a healthy fertile woman is dominated by bacteria of the genus: | 4 | [
{
"aid": 1,
"atext": "Peptostreptococcus"
},
{
"aid": 2,
"atext": "Bifidobacterium"
},
{
"aid": 3,
"atext": "Eubacterium."
},
{
"aid": 4,
"atext": "Lactobacillus"
},
{
"aid": 5,
"atext": "Vagococcus"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 192 | Lyme disease is caused by: | 1 | [
{
"aid": 1,
"atext": "Borrelia burgdorferi."
},
{
"aid": 2,
"atext": "Treponema saccharophilum."
},
{
"aid": 3,
"atext": "Spirillum commune."
},
{
"aid": 4,
"atext": "Leptospira interrogans."
},
{
"aid": 5,
"atext": "Limulus polyphemus."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 193 | The cholera toxin: | 3 | [
{
"aid": 1,
"atext": "Inhibits protein synthesis."
},
{
"aid": 2,
"atext": "It is hemolytic and dermonecrotic."
},
{
"aid": 3,
"atext": "Alters the flow of electrolytes in the intestine."
},
{
"aid": 4,
"atext": "It is formed by a single polypeptide that is cleaved by the effect of proteases."
},
{
"aid": 5,
"atext": "It produces food poisoning."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 194 | Botulinum toxin: | 3 | [
{
"aid": 1,
"atext": "It occurs in infected and poorly aerated wounds."
},
{
"aid": 2,
"atext": "Blocks protein synthesis."
},
{
"aid": 3,
"atext": "It blocks the secretion of acetylcholine in the myoneural plaque."
},
{
"aid": 4,
"atext": "It interferes with nerve impulse transmission at the level of axons."
},
{
"aid": 5,
"atext": "It causes necrosis of the nerve endings."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 195 | An important test to distinguish Staphylococcus aureus from saprophytic staphylococci, such as Staphylococcus epidermidis is: | 5 | [
{
"aid": 1,
"atext": "Oxidase"
},
{
"aid": 2,
"atext": "Catalase"
},
{
"aid": 3,
"atext": "Indole."
},
{
"aid": 4,
"atext": "Urea"
},
{
"aid": 5,
"atext": "Coagulase"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 196 | Pseudomonas aeruginosa is typically: | 3 | [
{
"aid": 1,
"atext": "Sensitive to most antibiotics used in human medicine."
},
{
"aid": 2,
"atext": "Pathogen obligated."
},
{
"aid": 3,
"atext": "Opportunistic pathogen."
},
{
"aid": 4,
"atext": "Commensal bacteria of the digestive tract."
},
{
"aid": 5,
"atext": "Intracellular pathogen."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 197 | Infections caused by Clostridium tetani, Bordetella pertussis, Corynebacterium diphtheriae and Vibrio cholerae have in common: | 3 | [
{
"aid": 1,
"atext": "The type of transmission."
},
{
"aid": 2,
"atext": "The reservoir."
},
{
"aid": 3,
"atext": "The production of exotoxins."
},
{
"aid": 4,
"atext": "The affected organs."
},
{
"aid": 5,
"atext": "The route of infection."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 198 | The main virulence factor of Streptococcus pneumoniae is one (one): | 2 | [
{
"aid": 1,
"atext": "Fímbria."
},
{
"aid": 2,
"atext": "Capsule."
},
{
"aid": 3,
"atext": "Scourge"
},
{
"aid": 4,
"atext": "Endotoxin"
},
{
"aid": 5,
"atext": "Adhesin"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 199 | Legionella pneumophila is transmitted by: | 1 | [
{
"aid": 1,
"atext": "Air conditioning systems."
},
{
"aid": 2,
"atext": "Contact between individuals."
},
{
"aid": 3,
"atext": "Mosquito bite."
},
{
"aid": 4,
"atext": "Contaminated food."
},
{
"aid": 5,
"atext": "Fecal-oral route."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 200 | It contains a Gram negative species that causes meningitis the genus: | 5 | [
{
"aid": 1,
"atext": "Trichomonas."
},
{
"aid": 2,
"atext": "Pasteurella"
},
{
"aid": 3,
"atext": "Burkholderia."
},
{
"aid": 4,
"atext": "Francisella."
},
{
"aid": 5,
"atext": "Neisseria."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 201 | In mammals, Toll-like receptors (TLRs) are receptors: | 1 | [
{
"aid": 1,
"atext": "Signaling."
},
{
"aid": 2,
"atext": "Antigenic"
},
{
"aid": 3,
"atext": "Of histocompatibility alleles."
},
{
"aid": 4,
"atext": "Of phagocytosis."
},
{
"aid": 5,
"atext": "Of chemokines."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 202 | The innate immune response to viruses is mainly mediated by lymphocytes: | 4 | [
{
"aid": 1,
"atext": "B1"
},
{
"aid": 2,
"atext": "Th1."
},
{
"aid": 3,
"atext": "Cytolytic T"
},
{
"aid": 4,
"atext": "NK"
},
{
"aid": 5,
"atext": "Tγδ."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 203 | The main function of chemokines is: | 1 | [
{
"aid": 1,
"atext": "Regulate lymphocyte traffic."
},
{
"aid": 2,
"atext": "Stimulate cell proliferation in response to chemical agents."
},
{
"aid": 3,
"atext": "Amplify the production of antiviral cytokines."
},
{
"aid": 4,
"atext": "Regulate the selection in the thymus."
},
{
"aid": 5,
"atext": "Antagonize some cytokines."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 204 | Interactions between selectins and vascular targeins: | 2 | [
{
"aid": 1,
"atext": "They are very strong."
},
{
"aid": 2,
"atext": "They mediate the first phase of the leukocyte / endothelium adhesion."
},
{
"aid": 3,
"atext": "They are permanent."
},
{
"aid": 4,
"atext": "They mediate firm adhesion to the endothelium."
},
{
"aid": 5,
"atext": "They are very intense in the spleen."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 205 | In the processing and presentation of peptides of extracellular origin intervene (n): | 3 | [
{
"aid": 1,
"atext": "The TAP proteins."
},
{
"aid": 2,
"atext": "The tapasina."
},
{
"aid": 3,
"atext": "The HLA-DM molecule."
},
{
"aid": 4,
"atext": "The proteosome."
},
{
"aid": 5,
"atext": "The HLA-B molecules."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 206 | The main autocrine growth factor for most T lymphocytes after antigen recognition is: | 1 | [
{
"aid": 1,
"atext": "Interleukin 2"
},
{
"aid": 2,
"atext": "Interleukin 4"
},
{
"aid": 3,
"atext": "Interleukin 10"
},
{
"aid": 4,
"atext": "TGF-beta."
},
{
"aid": 5,
"atext": "All the previous ones"
}
] |
Cuaderno_2013_1_B | 2013 | biology | 207 | Tα CD4 + lymphocytes: | 1 | [
{
"aid": 1,
"atext": "They are functionally cooperative with B lymphocytes and other T lymphocytes."
},
{
"aid": 2,
"atext": "They recognize native antigens in soluble form."
},
{
"aid": 3,
"atext": "They recognize peptides in the MHC class I context."
},
{
"aid": 4,
"atext": "They are less abundant than CD8 + in human blood."
},
{
"aid": 5,
"atext": "They release perforins."
}
] |
Cuaderno_2013_1_B | 2013 | biology | 208 | It is more characteristic of Th1 than Th2 lymphocytes: | 5 | [
{
"aid": 1,
"atext": "Interleukin 5"
},
{
"aid": 2,
"atext": "The TGF-beta."
},
{
"aid": 3,
"atext": "Interleukin 10"
},
{
"aid": 4,
"atext": "Interleukin 17"
},
{
"aid": 5,
"atext": "The IFN-γ."
}
] |
Subsets and Splits