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The most frequent causal agent of infections related to the use of intravascular catheters in hospitals is: | Enterococcus faecalis. | Escherichia coli. | Staphylococcus aureus. | Biology | Coagulase-negative Staphylococcus. | 148 | 3 | 907b551a-bf9b-4dd1-8034-7766bac6ad17 | 2021 |
Which of the following bacteria has been found inside free-living amoebas: | Legionella. | Bordetella. | Mycoplasma. | Biology | Moraxella. | 149 | 2 | aaae1dd1-649d-413d-866d-dfdf00780e8a | 2021 |
The etiological agent of the sexually transmitted infection known as "chancroid" or "soft chancre" is: | Neisseria gonorrhoeae. | Chlamydia trachomatis. | Haemophilus ducreyi. | Biology | Mycoplasma genitalium. | 150 | 4 | 997fdbec-1cf0-418c-8595-a934d41730e2 | 2021 |
What is the main known reservoir of Helicobacter pylori infection? | Wild birds. | The rodents. | The human being. | Biology | The reptiles. | 151 | 4 | ee65f236-c0f3-4384-9e7c-16b39f0065cd | 2021 |
Brucellosis is a zoonosis that is not transmitted by: | The bite of a blood-sucking mosquito. | Ingestion of unpasteurized dairy derivatives. | Direct contact through wounds in the skin. | Biology | Inhalation of the microorganism. | 152 | 2 | 97e84016-d289-4519-871c-43cc9fb7ff85 | 2021 |
Regarding gastrointestinal infections caused by Escherichia coli, it is false that: | Enteropathogenic E. coli is a frequent cause of diarrhea in infants. | Enterotoxigenic E. coli is associated with the production of heat-stable and heat-labile enterotoxins. | Enteroinvasive E. coli is associated with the production of Shiga toxin. | Biology | Enterohemorrhagic E. coli is associated with the serotype O157:H7. | 153 | 4 | 57eef714-920d-4699-aa3d-9be136b1c783 | 2021 |
Regarding carbapenemases, it is true that: | They are characteristics of Gram-positive bacteria. | They can confer resistance to penicillins, cephalosporins and carbapenems. | They are never located in transferable genetic elements. | Biology | They are not very common in Klebsiella pneumoniae. | 154 | 1 | 688e62f9-fb90-462c-b2f3-5b7874749787 | 2021 |
One of the following statements regarding Pseudomonas aeruginosa is false: | Causes severe lung infections in patients with cystic fibrosis. | It is a Gram-negative, non-fermenting bacillus, oxidase negative. | It is usually resistant to a large number of antibiotics. | Biology | Causes external otitis associated with swimming in pools. | 155 | 1 | 59bdeb59-06c9-45f9-a5f0-6faa69f6e7c4 | 2021 |
One of the following pairs of antibiotic-resistance mechanisms is not common in Pseudomonas aeruginosa: | Carbapenems-OprD porin mutation. | Quinolones-efflux pumps. | Cephalosporins-beta-lactamases. | Biology | Aminoglycosides-modification of the DNA gyrase. | 156 | 3 | e972c62c-68e9-4351-8a55-338bdae77d42 | 2021 |
Which of the following characteristics of Mycobacterium tuberculosis is false?: | It stains well with Gram staining, including the spores. | It is a strict aerobic bacillus. | The wall has many lipids, including mycolic acids. | Biology | It has slow growth in culture mediums. | 157 | 2 | 92f9c271-cde5-4cd8-9302-ba4b9ed87363 | 2021 |
Which of the following statements about tuberculosis is false?: | The definitive microbiological diagnosis is based on the isolation and identification of the tuberculous bacillus. | Pulmonary tuberculosis is transmitted from person to person through the air. | It is a disease with a very high cure rate when the treatment is performed correctly. | Biology | The tuberculin test (PPD) and/or the production of interferon-gamma by lymphocytes (IGRA) are used to determine if a person is contagious. | 158 | 3 | 3ac1da0d-48aa-4c0f-8119-ed9a2ef49f47 | 2021 |
Which of the following statements about the genus Nocardia is false?: | They are weakly acid-alcohol resistant bacilli. | They are Gram-positive bacilli and aerobic. | The treatment of choice is cotrimoxazole (trimethoprim-sulfamethoxazole). | Biology | The natural habitat (primary reservoir) is humans. | 159 | 3 | dfaab0b4-667d-4bd1-ab88-981748edaaae | 2021 |
Which of the following statements regarding mycoplasmas is true?: | They lack a cell wall. | They are acid-alcohol resistant. | The treatment of choice are beta-lactam antibiotics. | Biology | These are bacteria that grow rapidly (less than 24 hours). | 160 | 2 | bab21318-e0b9-4b72-a955-a14ff40e5be8 | 2021 |
It is true that in Lyme disease: | It is a sexually transmitted infection. | It is caused by Leptospira interrogans. | The microbiological diagnosis is based on serology. | Biology | Disease that is located in Australia. | 161 | 4 | 541f0946-6b56-414a-8c7b-d1a57dbe7fc9 | 2021 |
Regarding Treponema pallidum, it is false that: | It does not grow in artificial culture mediums. | It is a mobile bacteria, visible under dark field microscopy. | The treatment of choice is penicillin. | Biology | In humans, it causes psittacosis or ornithosis. | 162 | 3 | e36e0f31-827a-4701-9088-d0742b78f8f4 | 2021 |
Regarding the Toscana virus, it is false that: | It is a neurotropic virus, which can potentially become a significant etiological agent of viral meningitis in some regions of Spain. | It is transmitted by the bite of a sandfly of the genus Phlebotomus spp. | Serology rarely has cross-reactions with other phleboviruses. | Biology | The detection through PCR, in cerebrospinal fluid, is the method of choice for the diagnosis of neurological infection. | 163 | 4 | fd48a0c3-323b-4c9e-b241-cee70ca8c1cb | 2021 |
Indicate the correct association between family and RNA virus: | Ebola Virus - Rhabdovirus. | Measles Virus - Paramyxovirus. | Rotavirus - Filovirus. | Biology | Marburg Virus - Reovirus. | 164 | 1 | 9b189953-7ef5-46cd-81d7-eaba3e7b33c8 | 2021 |
Regarding noroviruses, it is true that: | Two days after the prodromic period, typical lesions appear on the mucous membranes known as Köplik spots. | They are primarily transmitted via the bloodstream. | They have a small capsid whose morphology allows them to be distinguished by electron microscopy. | Biology | It is not possible to apply PCR for the detection of the genome in stool samples. | 165 | 4 | aa9040d9-7a83-488d-86d3-299996104e16 | 2021 |
Regarding the human cytomegalovirus, it is true that: | It belongs to the subfamily Alphaherpesvirinae. | The sources of infection in the newborn are transplacental transmission, intrauterine infection, and cervical secretions. | Symptomatic infection primarily occurs in immunocompetent individuals. | Biology | The recurrent disease is not a source of contagion. | 166 | 1 | 3af30a55-a7e5-458f-8738-925baf1e5687 | 2021 |
Which of the following is a marker of acute Epstein-Barr virus infection?: | Anti-nuclear antibodies (anti-EBNA). | RPR Antigen (Rapid Plasma Reagin). | Heterophil antibodies. | Biology | Australia Antigen. | 167 | 4 | aec77af9-3ca8-49a5-b6d4-3da8c40c1e20 | 2021 |
Subacute sclerosing panencephalitis is a late complication of the infection caused by: | Measles. | Flu. | Cytomegalovirus. | Biology | Measles. | 168 | 2 | 653a36de-d7c8-4d36-a50c-048d64645435 | 2021 |
Which of the following viruses is a defective agent that needs another virus for its replication?: | Hepatitis B virus. | Hepatitis A virus. | Hepatitis D virus. | Biology | Hepatitis C virus. | 169 | 4 | bca2cc23-1aca-4f9d-b848-72b8aaf5ed77 | 2021 |
Among the groups into which the human immunodeficiency virus type 1 (HIV-1) is divided, the one that causes the majority of infections and is the main responsible for the pandemic is: | HIV-1 Group N. | HIV-1 Group M. | HIV-1 Group O. | Biology | HIV-1 Group P. | 170 | 1 | 48a24c0a-181b-4468-a986-07ca97f40d5c | 2021 |
In an individual infected by the human immunodeficiency virus type 1 (HIV-1), what is the first detectable marker in the blood? | IgG class antibodies. | IgM class antibodies. | Viral RNA. | Biology | p24 Antigen. | 171 | 4 | 25198ab6-77d4-4736-bf1d-d6aaf29d797d | 2021 |
In the evolution of the infection by the human immunodeficiency virus type 1 (HIV-1), what is the level of CD4+ T lymphocytes in blood that marks the onset of immunodeficiency? | 350 CD4+ cells/ µL. | 200 CD4+/µL. | 1000 CD4+ cells/ µL. | Biology | 500 CD4+ cells/ µL. | 172 | 1 | ea31d8b4-1ce0-4933-a39c-147d19eedef4 | 2021 |
Which pathogen would you suspect in a patient who presents with a case of dysentery with blood and mucus, and high fever upon returning from their trip to India? | Entamoeba hartmanni. | Entamoeba coli. | Entamoeba dispar. | Biology | Entamoeba histolytica. | 173 | 3 | 1c3d26e6-e8cb-4e19-b548-885e1053b489 | 2021 |
What is the only pathogenic ciliated protozoan for humans? | Chilomastix mesnili. | Balantidium coli. | Trichomonas hominis. | Biology | Enteromonas hominis. | 174 | 1 | c68d91f1-bc71-4f0c-9db0-f4d7d923a09e | 2021 |
Which of the following is not a transmission route for American trypanosomiasis or Chagas disease? | Oral. | Congenital. | Vectorial. | Biology | Through aerosols. | 175 | 3 | 22059d5f-a968-4884-9aa2-00519f9f47cd | 2021 |
In which samples are Ascaris eggs or larvae usually not found? | Gastric aspiration. | Sputum. | Feces. | Biology | Urine. | 176 | 3 | 41e4aaec-4078-47e0-872e-673ccfd6388a | 2021 |
The T wave of the electrocardiogram corresponds to: | The depolarization of the ventricles. | The depolarization of the atria. | The repolarization of the ventricles. | Biology | The repolarization of the atria. | 177 | 4 | d9242e69-8581-4fd5-9587-21deeb9880f4 | 2021 |
The term haustras or "haustral churning" refers to: | A gastroileal reflex that intensifies peristalsis in the ileum. | A pathology associated with the loss of fats in stools. | Segmentation contractions of the large intestine. | Biology | The degree of contraction of the ileocecal sphincter or valve. | 178 | 4 | 719b6885-695c-4f44-b7cc-d036416c57a0 | 2021 |
The Golgi tendon organ is designed to inform of: | The angle formed by the bones. | The size of the muscle at each moment. | The tension generated by a muscle when it contracts. | Biology | The speed of body position changes. | 179 | 4 | 1c786327-4fe3-4045-a399-63f67b891ab5 | 2021 |
Regarding the electroporation of bacteria for use in gene cloning: | With electroporation, efficiencies lower than those achieved by chemical transformation are obtained. | It requires the use of an electric current to create transient pores in the bacterial wall that close when the current is cut off, trapping the DNA plasmid inside. | It is a more efficient and cheaper method than chemical transformation. | Biology | It is carried out at 42ºC, to reduce the potential damage to the DNA. | 180 | 1 | 38914bdf-24b4-4335-9c0d-3d60325513ad | 2021 |
Which protein is part of the TCR complex? | CD19. | CD3. | CD8. | Biology | CD4. | 181 | 1 | f539fa26-8af4-4422-87c7-91334f7ac259 | 2021 |
The age variable is collected in a questionnaire in the following way: <20, [20-50], >50. What type of variable is this?: | Continuous quantitative. | Discrete quantitative. | Nominal polytomic qualitative. | Biology | Ordinal qualitative. | 182 | 3 | 9071bfbf-1153-4ad2-85a8-33f419d256a2 | 2021 |
A transposon is: | A mobile DNA fragment. | A protein fragment. | A chaperone. | Biology | A very specific enzyme of protein metabolism. | 183 | 2 | 4fd2d321-8fae-4ca1-ae31-733c4275ce7e | 2021 |
The sentence that is not correct is: | The central dogma of molecular biology has been surpassed by reality, as we now know it: for example, there are viruses that can synthesize DNA from RNA. | The central dogma of molecular biology, as initially postulated by Crick, proposes that only DNA is transcribed into RNA, and that only RNA is translated into protein. | The duplication of DNA is semiconservative. | Biology | DNA replication, in eukaryotes, occurs during the metaphase, before the chromosomes condense. | 184 | 3 | aee97310-96d8-41a8-97e1-3d4271de9c7e | 2021 |
Indicate the incorrect association: | Neonatal Sepsis-Streptococcus agalactiae. | Scarlet Fever-Streptococcus pyogenes. | Endocarditis- Enterococcus spp. | Biology | Toxic Shock Syndrome- Enterococcus faecalis. | 185 | 3 | dc512dd6-b944-45be-be61-e70c59e6c801 | 2021 |
The resting potential of neurons is close to -70 mV because: | The Ca2+ channels are open. | The membrane is very permeable to Na+. | The K+ channels are closed. | Biology | The permeability of its membrane to K+ is greater than for other ions. | 1 | 3 | b78e63a5-a0cb-4985-b2bb-c27fd775dbe6 | 2020 |
The release of neurotransmitter in chemical synapses: | It is evoked by the interaction of Na+ with the synaptic vesicle. | It is independent of the concentration of Ca2+. | It occurs in a quantum manner. | Biology | It occurs through active transport. | 2 | 4 | 0f86d27a-f57c-4870-b3b6-1eae69580ecb | 2020 |
The receptors for odoriferous molecules: | They have tyrosine kinase activity. | They are of the ionotropic type. | They are located in the cytosol. | Biology | They are coupled to G proteins. | 3 | 3 | 3607409d-a10e-4dfd-bec3-579072225637 | 2020 |
The primary motor cortex is located in the lobe: | Parietal. | Frontal. | Occipital. | Biology | Temporal. | 4 | 1 | 73a64b1b-8dc7-4413-8573-16db7c583481 | 2020 |
The flexor reflex: | It is monosynaptic. | Requires reciprocal innervation. | It originates in the Golgi tendon organ. | Biology | It is evoked by stretching of the muscle. | 5 | 1 | b591fa58-98bd-44af-8813-d7ae3e283cb0 | 2020 |
The electroencephalogram of a healthy, awake, resting adult with eyes closed has a rhythm: | Beta. | Alpha. | Delta. | Biology | Gamma. | 6 | 1 | a325c98d-7747-4bf8-a52d-b09f499a1c10 | 2020 |
In a standard electrocardiogram: | The Einthoven triangle is arranged in the transverse plane. | The P wave is synchronous with the atrial contraction. | The aVR lead is precordial. | Biology | Derivation I is a bipolar record of the upper limbs. | 7 | 3 | 55110e54-eb9d-47d9-afcd-83ec3dd6cb0c | 2020 |
The left coronary flow decreases due to: | Adenosine. | The ventricular systole. | Nitric oxide. | Biology | Moderate myocardial hypoxemia. | 8 | 1 | 372fbfea-10dd-4dc2-b240-f8f3430ee683 | 2020 |
Fibrinogen is converted to fibrin by the action of: | Prostacyclin. | von Willebrand Factor. | Thrombin. | Biology | Thrombopoietin. | 9 | 4 | f39b7d45-56ce-42f7-ba9e-ddc3fbf9cd61 | 2020 |
The sympathetic nervous system acts on the heart through receptors: | Muscarinic cholinergic type. | Nicotinic type cholinergics. | Beta-type Adrenergic. | Biology | Alpha-type adrenergic. | 10 | 4 | e9173353-5597-4964-ae41-a20146060795 | 2020 |
Ventricular pressure is highest during the phase of: | Atrial systole. | Isovolumetric ventricular relaxation. | Ejection phase. | Biology | Isovolumetric ventricular contraction. | 11 | 4 | d1c2b70f-ce43-4b79-8270-53b42dd4cf70 | 2020 |
If the heart rate goes from 80 to 140 beats per minute: | There is turbulence in the blood flow. | The diastole shortens more than the systole. | The venous valves of the lower extremities dilate. | Biology | The intensity of the heart sounds increases. | 12 | 1 | 242a3923-1969-41b0-a3c6-65d372823958 | 2020 |
The minute respiratory volume is: | The minimum volume needed to be without ventilation for one minute. | The product of the ventilatory frequency (cycles per minute) and the vital capacity (ml). | The maximum volume of air that can be ventilated in a minute. | Biology | The product of the tidal volume (ml) and the respiratory rate (cycles per minute). | 13 | 3 | ab1095fb-b424-41a0-8180-4f7724a6cacd | 2020 |
The anatomical dead space is the volume of air that: | It remains in the lungs after a forced expiration. | Inhaling and exhaling occur in each resting respiratory cycle. | It remains in the airways without reaching the alveoli. | Biology | Enters the lungs during a forced inhalation. | 14 | 4 | 4eef4adc-c73e-40b1-b50e-6564a0e58dc0 | 2020 |
The intrapleural pressure is equal to the atmospheric pressure in: | Resting inspiration. | Pneumothorax. | Resting expiration. | Biology | Forced inspiration. | 15 | 1 | 49c1a87d-c1d3-4620-bbfd-73631a16cf1e | 2020 |
The resistance of the airways decreases due to: | Histamine. | Adrenaline. | Acetylcholine. | Biology | Local reduction of CO2 pressure. | 16 | 1 | fb29fb08-dd6b-40fe-8af4-5afb5cdc9da8 | 2020 |
The juxtaglomerular apparatus releases: | ADH. | Aldosterone. | Angiotensin. | Biology | Renin. | 17 | 3 | 393009d7-0cee-4140-a4cb-0a93abec842d | 2020 |
Aldosterone: | Increases the water permeability of the collecting tubules. | It is released in the pituitary gland. | Regulates the concentration of plasma potassium. | Biology | Increases the excretion of sodium through the distal tubules. | 18 | 4 | d7c53308-765a-4896-b76a-e29718abea67 | 2020 |
The osmotic reabsorption of water is maximum in: | Ascending Loop of Henle. | Distal tubule. | Collecting tubule. | Biology | Proximal tubule. | 19 | 3 | 66ee0162-77c0-4ca8-9474-f33858ddc8d4 | 2020 |
Reduces glomerular filtration: | Norepinephrine. | Nitric oxide. | Vasoconstriction of the efferent arteriole. | Biology | Hypoproteinemia. | 20 | 2 | a378a131-6672-48cd-9a5a-7d5be499e1e5 | 2020 |
The renal clearance of para-aminohippuric acid allows to estimate: | Renal plasma flow. | Glomerular filtration. | Urinary flow. | Biology | Renal reabsorption rate. | 21 | 2 | 8a00cf84-5c3d-4da1-9f93-f0c2528a8b3b | 2020 |
The renal blood flow: | It is greater in the cortex than in the renal medulla. | It represents less than 5% of cardiac output. | It is maximum in the renal medulla. | Biology | It is equivalent in the different renal regions. | 22 | 2 | 408322df-8f48-42c4-8059-64fdc004bd60 | 2020 |
Stimulates the appetite: | Cholecystokinin (CCK). | Ghrelin. | Glucagon-like peptide (GLP-1). | Biology | Peptide YY (PYY). | 23 | 1 | f552b990-b504-46d5-aedf-923de34aefdb | 2020 |
Inhibits the intestinal secretion of electrolytes and water: | Peptide YY (PYY). | Gastrin. | Histamine. | Biology | Serotonin. | 24 | 2 | d573b523-46e9-4ee9-9fc9-d6dad12edde7 | 2020 |
The main function of secretin is to stimulate secretion: | Pancreatic. | Gastric. | Of the colonic mucosa. | Biology | Salivate. | 25 | 2 | 5ddd4067-e85f-4095-8293-dfdfff2c465a | 2020 |
Enzyme on the brush border of enterocytes relevant in the digestion of carbohydrates: | Amylase. | Lipase. | Chymotrypsin. | Biology | Lactase. | 26 | 3 | bf060f59-3eea-4c1d-b127-d06fa40a0482 | 2020 |
The acidic gastric secretion: | It is stimulated by histamine. | Promotes the intestinal absorption of vitamin D. | It is stimulated by somatostatin. | Biology | It is inhibited by the parasympathetic nervous system. | 27 | 2 | 699ba032-2703-449b-966b-9ad5d8a63f50 | 2020 |
In a situation of physiological hyperglycemia, it decreases: | Insulin sensitivity. | The hepatic uptake of glucose. | The muscular use of glucose. | Biology | The secretion of growth hormone (GH). | 28 | 3 | 8960e393-961d-4f63-9b40-74a463b55c4f | 2020 |
The thyroid hormones: | They stimulate lipolysis. | Body fat deposits increase. | They have no effects on the metabolism of fats. | Biology | They decrease the intake of food. | 29 | 2 | 3d8ba86d-28f0-4098-b4a2-a3258954ee8d | 2020 |
It is a gonadotropin: | Luteinizing hormone (LH). | Oxytocin. | Growth Hormone-Releasing Hormone (GHRH). | Biology | Growth Hormone (GH). | 30 | 2 | b515c45f-cf50-413f-a2a7-bc60ed9a5ac1 | 2020 |
In the neurohypophysis, it releases: | Antidiuretic hormone. | Growth hormone. | The adenohypophyseal hormones. | Biology | All hypothalamic releasing factors. | 31 | 2 | 747c9c8a-2ff1-471e-9f60-ee8b2b58750d | 2020 |
During a prolonged fast, at the plasma level: | The growth hormone decreases. | Increases the insulin/glucagon ratio. | The ketone bodies increase. | Biology | The fatty acids decrease. | 32 | 4 | d2e94a5c-6ef8-4835-854c-bd9446e198c7 | 2020 |
It is considered that a blastocyst is an embryo: | From 3-4 days, with approximately 10 cells. | From a single cell. | In which the three embryonic layers have been differentiated. | Biology | From 5-6 days, with approximately 100 cells. | 33 | 3 | ece8e9a6-9038-4b24-9c34-080a59c444a5 | 2020 |
After embryonic implantation, the corpus luteum: | It degenerates, because it is no longer necessary. | Continues producing estrogens and progesterone. | It stops producing progesterone, but maintains the production of estrogens. | Biology | It transforms into a new Graafian follicle. | 34 | 1 | 575243f2-0bc4-41ec-a084-43baf9d7179f | 2020 |
Derives from the mesonephric duct (of Wolff): | The urinary bladder. | The ureter. | The urethra. | Biology | The vas deferens. | 35 | 3 | 2d8a1375-e25f-4f9b-8667-5cbe5b10e0b3 | 2020 |
Gives rise to the nucleus pulposus of the intervertebral disc: | The intermediate mesoderm. | The somatopleura. | The notochord. | Biology | The dermatomyotome. | 36 | 4 | 8372132f-0055-4444-a35e-9fd6e8351891 | 2020 |
It has a squamous epithelium with Morgagni's columns: | Gastric fundus. | Glottis. | Year. | Biology | Duodenum. | 37 | 4 | 9194b7db-1ad2-4575-8364-e87537ea5f46 | 2020 |
they are not part of the blood-brain barrier: | Astrocytic feet. | Continuous capillary endothelium. | Neurons. | Biology | Pericytes. | 38 | 4 | b2c385d9-00b2-47f4-8d44-b14a770f894c | 2020 |
Tissue component rich in proteoglycans, such as syndecan, or glycoproteins, like fibronectin: | Cytoskeleton of fibroblasts. | Extracellular matrix. | Stereocilia and microvilli. | Biology | Cilia of the pulmonary epithelium. | 39 | 1 | 27801064-823a-4689-b398-7944dc457c26 | 2020 |
They participate in opsonization: | Stem cells. | Mast Cells. | Neutrophils and monocytes. | Biology | Megakaryocytes. | 40 | 4 | a1ac40a3-08fc-44ac-8729-dd485043e72a | 2020 |
The translation of beta-tubulin is completed in: | Golgi Apparatus. | Rough endoplasmic reticulum. | Endoplasmic vesicles. | Biology | Cytosol. | 41 | 3 | 5b72f4f3-a344-4aaa-a155-ae6c55a303a5 | 2020 |
it's not a common characteristic of cartilaginous and bone tissues: | Being highly irrigated tissues. | Derive from the mesenchyme. | Possess matrix-forming cells. | Biology | Contain gaps in the matrix. | 42 | 2 | 6e67cdd2-6f38-462f-b856-a690896e4942 | 2020 |
The myelin: | It is composed of Schwann cells in the central and peripheral nervous systems. | Causes the saltatory conduction of the nerve impulse. | It is very abundant in the nerve fibers of the autonomic system. | Biology | It corresponds to a lipid secretion of the Schwann cells. | 43 | 1 | 5662f8ea-cf66-4acd-b3c4-a7b7df1bfc31 | 2020 |
The layers or tunics that form the arterial wall, from the lumen to the exterior, are: | Intima, media and adventitia. | Mucosa, media and adventitia. | Intima, media and serosa. | Biology | Serosa, media, and adventitia. | 44 | 2 | 85085bb2-d7f5-4ca5-835e-a23e3e5944be | 2020 |
Which coat proteins direct vesicular traffic from the endoplasmic reticulum to the Golgi apparatus? | COP I. | Clathrin. | The coat proteins are not necessary for the transfer. | Biology | COP II. | 45 | 3 | 4d89b5a0-94fe-4ffd-845c-3da338dbffff | 2020 |
At the cellular level, the p53 protein: | It induces proliferation. | Stops the cell cycle. | Promotes growth. | Biology | Inhibits apoptosis. | 46 | 1 | 51c422a7-9ddd-49b7-bb64-e7422825318e | 2020 |
Calnexin and calreticulin are: | Golgi processing enzymes. | Cytosolic calcium-sensing proteins. | Endoplasmic reticulum chaperones. | Biology | Components of the proteasome. | 47 | 4 | d7fa4cd1-70c8-4fc4-8fd8-93572695df6b | 2020 |
The nucleating role of the centrosome is due to the presence of: | ARP2/3. | γ-tubulin. | Myosin. | Biology | Foraminifera. | 48 | 1 | 7711531c-078c-4630-8d1c-4582a7b1d1a9 | 2020 |
Protein complex that physically links homologous chromosomes during meiosis: | Synaptonemal. | Kinetochore. | Cohesin. | Biology | Chiasma. | 49 | 2 | d7b95e46-2eb3-4f46-9122-d4e437db88e7 | 2020 |
Ribosomal proteins are synthesized in: | Rough endoplasmic reticulum. | The nuclear envelope. | Cytoplasm. | Biology | Nucleolus. | 50 | 4 | a93c7b3e-830f-43c6-b6ef-2901f9596bd9 | 2020 |
The cyclins: | They participate in the synthesis of the phenolic rings of steroids. | They participate in the synthesis of cyclic nucleotides. | They are primary transcription factors. | Biology | Activate specific kinases. | 51 | 3 | 37579797-c9bb-421a-89f8-2d445c3ee61c | 2020 |
The ubiquitins: | They are proteases. | They participate in the polymerization of microtubules. | They mark proteins for degradation in the proteasomes. | Biology | They are secondary transcription factors. | 52 | 4 | 88151d0e-f6f1-40cc-a5ea-d21b6ed4a499 | 2020 |
The coatomers (COP): | They are involved in membrane fusion. | They are involved in the formation of vesicles. | They are a component of heterochromatin. | Biology | They are residual bodies. | 53 | 1 | 4c685eda-0a15-49c6-9db6-f764937eddbc | 2020 |
The chaperones: | They are a type of coated vesicles. | They block the actin filaments. | They are protein translocators. | Biology | They are involved in the folding of proteins. | 54 | 3 | 317b7bb5-ff6a-49a6-b4ad-8e9d662657ad | 2020 |
The fusion of B lymphocyte-tumor plasma cell for the production of monoclonal antibodies generates: | A hybridoma. | A myeloma. | A spindle-shaped cell. | Biology | A sarcoma. | 55 | 2 | df6d7bc9-eb30-43ba-b5d8-c40ef639ee6e | 2020 |
What technique is commonly used to measure lymphocyte subpopulations in patients with HIV infection? | ELISA. | Immunofluorescence. | Flow Cytometry. | Biology | Chemiluminescence. | 56 | 4 | 29c94c58-2e08-42a9-98ca-e00f8983b5e9 | 2020 |
Pernicious anemia is not related to antibodies against: | Parietal cells of the stomach. | Goblet cells of the ileum. | Intrinsic factor. | Biology | Vitamin B12 and the intrinsic factor bound together. | 57 | 1 | 3c21090d-601f-4c01-ac43-a4eba9a56f7b | 2020 |
Which markers are used to identify B lymphocytes in flow cytometry? | CD19 and CD20. | CD3 and CD4. | CD80 and CD86. | Biology | CD45 and CD45RO. | 58 | 2 | 7b511ae9-f62f-42ad-82cd-9a453eaca547 | 2020 |
What pathology is a non-organ-specific autoimmune disease? | Type I diabetes mellitus. | Erythematous Lupus. | Hashimoto's Thyroiditis. | Biology | Myasthenia gravis. | 59 | 1 | f297ce94-4a1d-4e41-b5e6-34099545fde1 | 2020 |
A graft transplanted between two individuals of the same species with a different genetic composition is a: | Xenograft. | Autograft. | Iso-graft. | Biology | Allograft. | 60 | 3 | 96f4833a-a9fe-464c-9bfa-f758cc1f3d1b | 2020 |
Which molecules regulate the migration and selective recruitment of leukocytes? | Selectins. | Cytokines. | Chemokines. | Biology | Integrins. | 61 | 4 | 8d61d755-9846-404d-b7d2-b317bd84ff97 | 2020 |
Which cells of the innate immune system are not of myeloid lineage? | Basophils. | Eosinophils. | Macrophages. | Biology | ILC Cells. | 62 | 3 | 578c3d96-f726-4b7e-9ca8-dbf956d17a26 | 2020 |
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