Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate:

NEET-2024 [Respiration-in-Plants] [class-xi ]

• Succinic acid → Malic acid
• Malic acid → Oxaloacetic acid
• Isocitrate → α-ketoglutaric acid
• Succinyl-CoA → Succinic acid
Correct Option: D  [ Succinyl-CoA → Succinic acid ]

Remark: Explanation: NCERT Page No.158, (Topic-12.4.1 Tricarboxylic Acid Cycle)

Match List I with List II:

NEET-2024 [Respiration-in-Plants] [class-xi ]

• A-III, B-IV, C-I, D-II
• A-IV, B-III, C-II, D-I
• A-I, B-II, C-III, D-IV
• A-II, B-I, C-IV, D-III
Correct Option: D  [ A-II, B-I, C-IV, D-III ]

Remark: Citric acid cycle - Mitochondrial matrix (NCERT Page No. 159).

Glycolysis - Cytoplasm (NCERT Page No. 155).

Electron transport system - Inner mitochondrial membrane (NCERT Page No. 159).

Proton gradient - Intermembrane space of mitochondria (NCERT Page No. 160).