GATE XL 2018 Paper 1 — page 21

Questions 61–63 of 125. Imported answers require review unless explicitly marked reviewed.

Select the CORRECT combination by matching Group-I with Group-II.

Group-I P. Photorespiration Q. Respiration R. Amino acid degradation S. Fatty acid synthesis

Group-II

Glutamate → 2-Oxoglutarate

Acetyl-CoA → Malonyl-CoA

2-Oxoglutarate → Succinyl-CoA

Glycine → Serine

Your answerChoose one option.

P-1, Q-2, R-3, S-4

P-2, Q-1, R-4, S-1

P-3, Q-4, R-2, S-3

P-4, Q-3, R-1, S-2

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Match the plant alkaloids with their uses and source species.

Alkaloid P. Codeine Q. Caffeine R. Scopolamine S. Vinblastine

Use

Stimulant

Analgesic

Antineoplastic

Anticholinergic

Source species i. Hyoscyamus niger ii. Catharanthus roseus iii. Cola nitida iv. Papaver somniferum v. Coptis japonica vi. Senecio jacobaea

Your answerChoose one option.

P-2-iv, Q-1-iii, R-4-i, S-3-ii

P-4-iii, Q-2-v, R-1-vi, S-3-i

P-2-v, Q-1-vi, R-3-iv, S-4-ii

P-3-ii, Q-4-iii, R-1-iv, S-2-i

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Identify the CORRECT combination of statements with respect to chemical defense in plants.

P. Pisatin, a phytoalexin produced by Ricinus communis is a constitutive defense compound Q. Phaseolus vulgaris produces Phaseolus agglutin I, which is toxic to the cowpea weevil R. A single step non-enzymatic hydrolysis of cyanogenic glycoside releases the toxic hydrocyanic acid (HCN) to protect plant against herbivores and pathogens S. Avenacin, a triterpenoid saponin from oat prevents infection by Gaeumannomyces graminis, a major pathogen of cereal roots

Your answerChoose one option.

P, Q

Q, S

R, S

P, S

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2018 · Paper 1

Question 16

Question 17

Question 18