Labmonk quiz, NET Life Science,
#1. In a stressful condition, ACTH secretion was increased and as a result glucocorticoid concentration was elevated in blood. One or a combination of the following changes most likely taking place in this condition: P. decreased circulating eosinophils and basophils. Q. reduced IL2 release. R. potentiated inflammatory response to tissue injury. S. increased mitotic activity of lymphocytes in lymph nodes. The correct answer is
#2. The time taken for atrial systole and diastole in a normal heart are tas and tad seconds, respectively. If ventricular systole takes tvs seconds, calculate the ventricular diastolic time (seconds).
#3. Atmospheric CO2 contains the naturally occurring stable carbon isotopes 12C and 13C in the proportion of 98.9% and 1.1%, respectively. Following are some of the statements regarding CO2 assimilation: P. Both C3 and C4 plants assimilate less 13CO2 than 12CO2. Q. Both C3 and C4 plants assimilate less 12CO2 than 13CO2. R. C3 plants assimilate lesser 13CO2 than 12CO2 as compared to C4 plants. S. C4 plants assimilate lesser 13CO2 than 12CO2 as compared to C3 plants. Which one of the following combinations of above statements is true?
#4. If the core body temperature of a human rises above normal, which of the following processes would be initiated sequentially for thermo-regulation?
#5. An organism having heart for circulation, excretes through green glands. It has several ganglia and tactile organs on its body and its larval form is very different than its adult form. This organism is most likely to respire by: P. exchanging oxygen and carbon dioxide through an extensive tracheal system. Q. gaseous exchange over thinner areas of cuticle or by gills. R. an efficient tracheal system that delivers oxygen directly to the tissues. S. a double transport system, where the circulating fluid contains a dissolved respiratory pigment. Choose the correct option.
#6. During urine formation, the filtration of blood at the glomerulus is
#7. During episodes of anoxia in plants, pyruvate produced in glycolysis is initially fermented to lactate. During later stage, there is an increase in the fermentation to ethanol and decrease in the fermentation to lactate, a phenomena which helps plants survive anoxia. Which of the following statements is correct about this change of fermentation flux from lactate towards ethanol?
#8. Spinal cord of an animal was transected at C1/C2 level. The respiration of the animal stopped and it needed artificial respiration. However, the heart continued to beat although at a slower rate. Some of the explanations given were: P. respiration regulatory centre is located in the medulla. Q. respiration regulatory centre is located above the C1/C2 cut. R. heart regulatory centre is above the C1/C2 cut. S. heart has autoregulation. Which one of the following is most appropriate?
#9. Following are some statements for synthesis of secondary metabolites in plants: P. Terpenes are synthesized by shikimic acid pathway and mevalonic acid pathway. Q. Alkaloids are nitrogen containing compounds and are synthesized by shikimic acid pathway. R. Phenolic compounds are synthesized by shikimic acid pathway and mevalonic acid pathway. S. Both alkaloids and terpenes are synthesized by mevalonic acid pathway and MEP pathway. Which one of the following combinations of the above statement is true?
#10. Graves disease is associated with
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