Assume that a cell makes only one amino acid: alanine. I add a molecule of palmi

Question

Assume that a cell makes only one amino acid: alanine. I add a molecule of palmitic acid (16C fatty acid). The cell is not energy-limited. Now, assuming the palmitic acid undergoes complete beta oxidation, and that the cell has no additional sources of carbon, how many extra molecules ofalanine will the cell make using the carbons of the palmitic acid? T T F F ? ? A)-5; Alanine is a 3-C amino acid B)-8; Each round off-oxidation releases an acetyl coA that can give a molecule of Alanine C) None; All carbons lost in TCA D) 4; Some carbons are lost due to inefficiency of reactions F ? T F ?

Explanation / Answer

Answer:- Option C

Explanation:- Palmitic acid 16 carbon fatty acid forms 8 molecules of acetyl-coA that enter TCA cycle which result in the formation of other amino acids like Glutamate, Glutamine, proline etc from alpha ketoglutarate. However none will result in alabaine formation these carbons are lost in the formation other amino acids. Alanine is formed from Pyruvate.

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