Exercise Question 066 XINCORRECT. Malonyl-CoA does not regulate any of the enzym

Question

Exercise Question 066 XINCORRECT. Malonyl-CoA does not regulate any of the enzymes in the synthesis of fatty acids. Malonyl-CoA inhibits carnitine acyl transferase 1. Inhibition of this enzyme keeps newly synthesized fatty acids out of the mitochondria. Which of the following statements most accurately describes the role of malonyl-CoA in fatty acid synthesis? It is a temporary "store" of free energy which enables the formation of a new carbon-carbon bond in the growing fatty acyl-chain O It regulates acetyl-CoA carboxylase activity via product inhibition, and thus regulates the rate of fatty acid synthesis. It is an inhibitor of CAT 1, and thus an activator of fatty acid synthesis. It is a "high-energy" carrier molecule for Co2, which enables the CO2 to be incorporated in the growing fatty acyl-chain.

Explanation / Answer

The correct answer is option A that is it stores temporarily the free energy that enables the formation of a new carbon-carbon bond in the growing fatty acyl-chain.

It does not inhibit CAT 1, so option C is the correct answer.

It is not a high energy carrier molecule for CO2, so again option D is incorrect answer.

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