Question: 139 Match List I with List II :
| List I | List II |
|---|---|
| A. Oxidative decarboxylation | I. Citrate synthase |
| B. Glycolysis | II. Pyruvate dehydrogenase |
| C. Oxidative phosphorylation | III. Electron transport system |
| D. Tricarboxylic acid cycle | IV. EMP pathway |
Choose the correct answer from the options given below :
(1) A-III, B-I, C-II, D-IV
(2) A-II, B-IV, C-III, D-I
(3) A-III, B-IV, C-II, D-I
(4) A-II, B-IV, C-I, D-III
Answer: Option (2)
Explanation:
Oxidative decarboxylation is the process by which pyruvate is converted into acetyl CoA with the release of carbon dioxide and reduction of NAD+.
This reaction is catalyzed by the enzyme complex pyruvate dehydrogenase, so A matches with II.
Glycolysis is the metabolic pathway that breaks down glucose into pyruvate in the cytoplasm.
It is also known as the EMP pathway, so B matches with IV.
Oxidative phosphorylation is the process of ATP synthesis using the energy released from electron transfer
through the electron transport system in the inner mitochondrial membrane.
Hence, C matches with III.
The tricarboxylic acid cycle begins with the condensation of acetyl CoA and oxaloacetic acid to form citrate. This reaction is catalyzed by the enzyme citrate synthase, so D matches with I.
Therefore, the correct matching is A-II, B-IV, C-III, D-I.