GATE XL topic:biology PYQs & Answers — Page 59

Questions 581–590 of 1235. Imported answers require independent review unless marked reviewed.

Match the drug/chemicals listed in Column I with the developmental/physiological defects listed in Column II.

Column I P. Veratrum alkaloids Q. Thalidomide R. Methylmercury S. Diethylstilbesterol

Column II (i) Obesity (ii) Minamata syndrome (iii) Cyclopia (iv) Phocomelia

Your answerChoose one option.

P-(ii); Q-(iv); R-(ii); S-(i)

P-(i); Q-(iv); R-(iii); S-(ii)

P-(ii); Q-(iv); R-(ii); S-(i)

P-(ii); Q-(iii); R-(iv); S-(i)

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Match the animals listed in Column I with primary tissue or organ of residence in the host listed in Column II.

Column I: P. Ascaris lumbricoides Q. Dracunculus medinensis R. Enterobius vermicularis S. Wuchereria bancrofti

Column II: (i) Subcutaneous tissue in human (ii) Lymphatic vessels and lymph nodes (iii) Small intestine (iv) Caecum or vermiform appendix

Your answerChoose one option.

P-(ii), Q-(iv), R-(ii), S-(i)

P-(i), Q-(iv), R-(iii), S-(ii)

P-(ii), Q-(iii), R-(iv), S-(i)

P-(iii), Q-(i), R-(iv), S-(ii)

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Match the cell types listed in Column I with their sources in Column II and the primary functional roles listed in Column III.

Column I: P. Microglial cells Q. Leydig cells R. ON cells S. Pneumocytes

Column II: (i) Lung (ii) Eyes (iii) Brain (iv) Testis

Column III: a. Visual transduction b. Hormone secretion c. Phagocytosis d. Gaseous exchange

Your answerChoose one option.

P-(iii)-b, Q-(iv)-c, R-(ii)-a, S-(i)-d

P-(ii)-c, Q-(iv)-d, R-(i)-a, S-(iii)-b

P-(i)-a, Q-(iv)-b, R-(ii)-c, S-(iii)-d

P-(iii)-c, Q-(iv)-b, R-(ii)-a, S-(i)-d

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Match the ecological concepts listed in Column I with their definitions listed in Column II.

Column I: P. Dominance hierarchies Q. Territory R. Altruism S. Kin selection

Column II: (i) Giving up one’s own reproductive potential to benefit another individual (ii) Selection acting on related animals which affects fitness of an individual (iii) Exclusion of competing individuals using agonistic behavior (iv) Preferential access to the food and mates in a group

Your answerChoose one option.

P-(ii), Q-(iv), R-(i), S-(iii)

P-(iv), Q-(ii), R-(i), S-(ii)

P-(ii), Q-(iv), R-(i), S-(ii)

P-(i), Q-(iv), R-(iii), S-(ii)

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Match the hormones listed in Column I with their primary source tissues in Column II and the primary target tissues listed in Column III.

Column I: P. Epinephrine; Q. Prolactin; R. Calcitonin; S. Thyrotropin releasing hormone

Column II: (i) Hypothalamus; (ii) Thyroid; (iii) Pituitary; (iv) Chromaffin tissue

Column III: a. Pituitary; b. Heart; c. Bone; d. Pigeon’s crop

Your answerChoose one option.

P-(ii)-b, Q-(iv)-c, R-(ii)-a, S-(i)-d

P-(iv)-c, Q-(iii)-b, R-(ii)-a, S-(i)-d

P-(iv)-b, Q-(ii)-d, R-(ii)-c, S-(i)-a

P-(iii)-b, Q-(iv)-c, R-(ii)-d, S-(i)-a

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2-Deoxyglucose (2-DG) inhibits the proliferation of cells and hence finds use as an anti-cancer agent. It is also used in COVID therapy, where it blocks hyperproliferation of virus-infected cells. Mechanically, 2-DG blocks glycolysis by inhibiting the activities of which of the following enzyme/s?

Your answerSelect all correct options. You can choose more than one.

Hexokinase

Glucose 6-phosphate isomerase

Glucose-6 phosphate dehydrogenase

Phosphofructokinase

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According to Abbe’s equation on microscopy, the ability to resolve two entities inside a cell by light microscopy depends on which of the following factor/s?

Your answerSelect all correct options. You can choose more than one.

Magnification of the objective lens

Intensity of incident light

Wavelength

Numerical aperture of the objective lens

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Match the animal inactivity behaviors listed in Column I with representative animals in Column II and their definitions listed in Column III.

Column I: P. Torpor; Q. Hibernation; R. Winter sleep; S. Aestivation

Column II: (i) Australian burrowing frogs; (ii) Polar Bears; (iii) Ground Squirrels; (iv) Hummingbirds

Column III: a. Prolonged period of inactivity without reducing body temperature; b. Inactivity period which accompanies extended periods of dryness; c. Decreased metabolism with lowered body temperature occurring in daily activity cycles; d. Decreased metabolism and lower body temperature for weeks or months

Your answerSelect all correct options. You can choose more than one.

P-(ii)-c, Q-(iv)-b, R-(i)-a, S-(iii)-d

P-(iv)-c, Q-(iii)-d, R-(ii)-a, S-(i)-b

P-(iv)-c, Q-(ii)-b, R-(i)-a, S-(iii)-d

P-(iv)-b, Q-(i)-c, R-(ii)-d, S-(iii)-a

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If the vital capacity (VC) of an individual is 4900 ml, the tidal volume (TV) is 500 ml, and the inspiratory reserve volume (IRV) is 3300 ml, the expiratory reserve volume (ERV) of the individual is _______ ml. (in integer).

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A typical food chain involves producers, herbivores, primary carnivores and secondary carnivores. Based on Lindeman’s law of trophic efficiency, if producers have 40 kJ of energy, the energy that will be stored in secondary carnivores is _____ kJ. (round off to two decimal places)

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GATE XL topic:biology PYQs

Question 93

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Question 101

Question 102