The tricarboxylic (TCA, citric, Krebb’s) cycle is the ‘metabolic engine’ in cells. Which of the following are features of the TCA cycle?

A. It occurs in the mitochondria

B. It provides reducing equivalents for dephosphorylation

C. It may occur without oxygen

D. Four ATPs are formed every full cycle

E. Four carbon dioxide molecules are formed every full cycle

Reveal the answer

A. It occurs in the mitochondria

Content adapted from ClinicalKey Student question bank

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