NEETBotanyRespiration in Plants
Match the reactions of the tricarboxylic acid cycle in List-I with their key biochemical events in List-II. List-I List-II (A) Succinyl-CoA Succinic acid (I) FAD is reduced to FADH ₂ (B) Succinic acid Fumaric acid (II) NAD ^+ is reduced with decarboxylation (C) Isocitrate -ketoglutaric acid (III) Substrate-level phosphorylation (D) Malic acid Oxaloacetic acid (IV) NAD ^+ is reduced without decarboxylation Choose the
Options
- AA-III, B-IV, C-II, D-I
- BA-III, B-I, C-II, D-IV
- CA-I, B-III, C-IV, D-II
- DA-II, B-I, C-III, D-IV
Correct answer
B. A-III, B-I, C-II, D-IV
Step-by-step solution
The tricarboxylic acid (TCA) cycle involves specific biochemical events at each step: (A) Succinyl-CoA Succinic acid: This step involves the synthesis of GTP from GDP, which is a substrate-level phosphorylation (III). (B) Succinic acid Fumaric acid: During this conversion, FAD is reduced to FADH₂ (I). (C) Isocitrate -ketoglutaric acid: This is an oxidative decarboxylation step where NAD ^+ is reduced to NADH + H ^+ and CO₂ is released (II). (D) Malic acid Oxaloacetic acid: In this step, NAD ^+ is reduced to NADH +