Odd-numbered fatty acids do occur -- although in lower amounts than even-numbere

ID: 881404 • Letter: O

Question

Odd-numbered fatty acids do occur -- although in lower amounts than even-numbered fatty acids.

In the last step of beta-oxidation of an odd numbered fatty acyl CoA, propionyl CoA is produced.

What could this propionyl-CoA be used for in metabolism. As you answer (before you answer) look at p. 473.

A. Propionyl CoA has no metabolic use; it will simply be secreted since it cannot directly enter the citric acid cycle.

B. Propionyl CoA, after several steps, including steps in the citric acid cycle, gives rise to a compound that could enter gluconeogenesis.

C. Propionyl CoA could enter glycolysis.

D. Propionyl CoA could be reduced in size by 1 C atom and then enter citric acid cycle as acetylCoA.

B. Propionyl CoA, after several steps, including steps in the citric acid cycle, gives rise to a compound that could enter gluconeogenesis.

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