GATE XL topic:life-sciences PYQs & Answers — Page 55

Questions 541–550 of 1235. Imported answers require independent review unless marked reviewed.

Which of the following is/are part of marine ecosystem?

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

Open ocean

Chaparral

Deep sea

Estuaries

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

In NADP⁺-malic enzyme type C₄ photosynthesis cycle,

molecule(s) of ATP is/are required for the assimilation of one molecule of CO₂. The value of

is ______ (in integer).

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

An Arabidopsis thaliana mutant plant developed defective flowers with altered floral organ identity and patterning. In this mutant, the four floral whorls contain Sepal-Sepal-Carpel-Carpel, from the periphery to the center of the flower.

Based on the typical ABC model of floral organ patterning, which among the following are mutated in this plant?

Your answerChoose one option.

Class A gene(s)

Class B gene(s)

Class C gene(s)

Double mutant for Class A and Class C genes

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match the secondary metabolites in Group-I with types of secondary metabolites in Group-II in CORRECT order.

Group-I: P. Myrcene Q. β-Farnesene R. Amygdalin S. Nicotine T. Luteolin

Group-II: I. Sesquiterpene II. Cyanogenic glycoside III. Flavone IV. Alkaloid V. Monoterpene

Your answerChoose one option.

P-I, Q-V, R-II, S-IV, T-III

P-V, Q-II, R-IV, S-I, T-III

P-II, Q-III, R-IV, S-V, T-I

P-V, Q-I, R-II, S-IV, T-III

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match Group-I (enzyme), Group-II (reaction catalyzed by the enzyme), and Group-III (subcellular location of the enzyme and the associated metabolic process) in CORRECT combination.

Group-I: P. PEP carboxylase Q. Rubisco R. Glycolate oxidase S. Pyruvate dehydrogenase

Group-II: I. 2 Glycolate + 2 O₂ = 2 Glyoxylate + 2 H₂O₂ II. Pyruvate + NAD⁺ + CoA = Acetyl-CoA + CO₂ + NADH III. Phosphoenolpyruvate + HCO₃⁻ = Oxaloacetate + Pi IV. 3 (Ribulose 1,5-bisphosphate) + 3 CO₂ + 3 H₂O = 6 (3-phosphoglycerate) + 6 H⁺

Group-III: a. Cytosol – C₄ cycle b. Peroxisome – C₂ cycle c. Mitochondria – aerobic respiration d. Chloroplast – C₃ cycle

Your answerChoose one option.

P-III-a, Q-IV-d, R-I-b, S-II-c

P-III-a, Q-III-d, R-I-b, S-IV-c

P-IV-a, Q-II-b, R-I-d, S-III-c

P-IV-a, Q-II-d, R-I-b, S-III-c

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match Group-I (selection agent) and Group-II (gene) in CORRECT combination.

Group-I: P. Kanamycin; Q. Hygromycin; R. Phosphinothricin; S. Mannose.

Group-II: I. pmi; II. bar; III. nptII; IV. ptxD; V. dhfr; VI. hpt

Your answerChoose one option.

P-III, Q-VI, R-II, S-I

P-IV, Q-II, R-II, S-I

P-I, Q-VI, R-III, S-II

P-II, Q-I, R-V, S-VI

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match Group I (plant natural product), Group II (class) and Group III (source plant) in CORRECT combination.

Group-I: P. Reserpine; Q. Resveratrol; R. Picrocrocin; S. Linamarin.

Group-II: I. Stilbenes; II. Cyanogenic glycoside; III. Alkaloid; IV. Monoterpene glycoside.

Group-III: a. Manihot esculenta; b. Crocus sativus; c. Vitis vinifera; d. Rauvolfia serpentina

Your answerChoose one option.

P-I-d, Q-II-c, R-IV-a, S-III-b

P-III-d, Q-IV-b, R-I-c, S-II-a

P-I-a, Q-III-b, R-I-d, S-IV-c

P-III-d, Q-I-c, R-IV-b, S-II-a

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match Group I (plant disease), Group II (causal organism) and Group III (affected plant) in CORRECT combination.

Group-I: P. Karnal Bunt; Q. Ergot; R. Late blight; S. Powdery mildew.

Group-II: I. Phytophthora infestans; II. Blumeria graminis; III. Neovossia indica; IV. Puccinia recondita; V. Claviceps purpurea; VI. Alternaria solani.

Group-III: a. Rice; b. Potato; c. Rye; d. Wheat; e. Barley; f. Brinjal

Your answerChoose one option.

P-III-a, Q-V-b, R-II-d, S-I-e

P-III-d, Q-V-c, R-II-e, S-IV-f

P-III-d, Q-V-c, R-I-b, S-II-e

P-V-c, Q-I-d, R-VI-b, S-II-e

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Make CORRECT match between Group-I and Group-II, in relation to interaction between two species.

Group-I: P. Neutralism; Q. Allelopathy; R. Amensalism; S. Mutualism. Group-II: I. neither can survive under natural condition without the other; II. direct inhibition of one species by the other species using toxic compound; III. neither is affected by the association with the other; IV. one is inhibited and the other is not affected.

Your answerChoose one option.

P-I, Q-II, R-III, S-IV

P-III, Q-II, R-IV, S-I

P-IV, Q-III, R-II, S-I

P-III, Q-IV, R-II, S-I

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Which of the following matches is/are CORRECT?

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

Surface fibre – Coton – Gossypium hirsutum

Bast fibre – Flax – Corchorus capsularis

Drying oil – Safflower oil – Helianthus annuus

Non-drying oil – Castor oil – Ricinus communis

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE XL topic:life-sciences PYQs

Question 53

Question 54

Question 55

Question 56

Question 57

Question 58

Question 59

Question 60

Question 61

Question 62