Move the terms to the appropriate blanks. Some terms will not be used, and some

Question

Move the terms to the appropriate blanks. Some terms will not be used, and some will be used more than once. Scroll down to see all the terms. Note that a single red X will appear if you answer any of the blanks incorrectly. Feedback will be placed next to a blank that is incorrectly filled. Fatty acid synthesis begins with a preparatory step in which acetyl CoA is transferred from However, it cannot pass through the membrane, so it is transported as citrate t which is cleaved to and oxaloacetate. In the cytosol, acetyl CoA is converted to malonyl three-carbon compound. Fatty acid synthesis begins with the transfer of the acetyl group from acetyl CoA to fatty acid synthase. Two -carbon groups, supplied by malonyl CoA ? are added to the growing acyl chain in a series of steps involving condensation, reduction and dehydration reactions. Elongation of the fatty acid chain stops at Three carbon atoms, after 16 cycles, as the free fatty acid is released.

Explanation / Answer

Answer: Elongation of the fatty acid chain stops at 16 carbon atoms after 7 cycles, as the free fatty acid is released.

Palmitate which is a 16 carbon fatty acid is the product of fatty acid synthase. Fatty acids with shorter chains are formed by releasing the fatty acid before it reaches 16 carbons. While fatty acids longer that 16 carbon atoms require elongation reactions. At the end of 7 cycles a 16 carbon chain is attached to the palmitoyl ACP.

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