15.which of the following statements is true. a. the citric acid cycle occurs in the matrix of the cell. b. each turn of the citric acid cycle requires two molecules of acetylcoa. c. the citric acid cycle is an anaerobic process d. in the citric acid cycle, pyruvate is degraded to produce acetyl coa. e. nadh, gtp, fadh2, and coenzyme a molecule are produced by the citric acid cycle.

The correct answer will be option-

1. Each turn of the Citric Acid Cycle requires two molecules of Acetyl-CoA

Explanation:

Citric acid cycle or Krebs cycle is the cyclic set of reaction taking place in the matrix of the mitochondria and associated with the production of reaction intermediates utilized in the production of the ATP molecules in the cellular respiration.

Citric acid cycle converts two molecules of Acetyl-CoA as two Acetyl-CoA are produced from pyruvate through pyruvate decarboxylation per glucose molecule.

Since the citric acid cycle is a part of the aerobic cellular respiration although oxygen is not utilized therefore it is considered an aerobic process.

Each turn of the Citric acid cycle produces one molecule of GTP, 3 NADH and 2 molecules of carbon dioxide but it does not form Coenzyme A molecule instead CoA is used and attached to Acetyl group.

Thus, the selected options are the correct answer.

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