B-the correct answer is b. citrate, formed from oxaloacetate and acetyl coa by the enzyme citrate synthase, inhibits phosphofructokinase and allosterically activates acetyl coa carboxylase. citrate synthase regenerates a molecule of coa and is an important regulator of the tricarboxylic acid cycle. it is inhibited by adenosine triphosphate.answer a is incorrect. -ketoglutarate is not an important regulator of the tricarboxylic acid cycle, but it is an important intermediate in protein metabolism.answer c is incorrect. malate is not an important regulator of the tricarboxylic acid cycle, but it is important in the malate shuttle.answer d is incorrect. oxaloacetate is not an important regulator of the tricarboxylic acid cycle, but it is important in glyconeogenesis.answer e is incorrect. succinyl-coa downregulates its own synthesis by inhibiting the enzyme responsible for dehydrogenation of -ketoglutarate.
Answer Anonymously
Copy Link
