The citric acid cycle is a unique metabolic pathway because it is cyclic. Which statement best describes how it is cyclic? A) It is cyclic because oxaloacetate is regenerated. B) It is cyclic because FAD and NAD⁺ are reduced. C) It is cyclic because CO₂ is regenerated. D) It is cyclic because it is linked with oxidative phosphorylation. E) All of the above are reasons that the citric acid cycle is cyclic.

Question

Quizplus · Accepted Answer

The citric acid cycle is cyclic because the starting molecule, oxaloacetate, is regenerated at the end of the cycle, allowing the process to continue in a circular manner. Option B is partially correct, as FAD and NAD+ are reduced during the cycle, but this is not the primary reason for the cyclic nature of the pathway. Option C is incorrect, as COSUB>2 is not involved in the citric acid cycle. Option D is partially correct, as the citric acid cycle is linked with oxidative phosphorylation, but this is not the primary reason for its cyclic nature. Option E is incorrect, as option C is not correct.

The Citric Acid Cycle Is a Unique Metabolic Pathway Because