GATE XL 2022 Paper 1 — page 19

Questions 55–57 of 122. Imported answers require review unless explicitly marked reviewed.

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

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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

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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

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2022 · Paper 1

Question 55

Question 56

Question 57