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Specialty Chemistry Forums => Biochemistry and Chemical Biology Forum => Topic started by: Judy on April 11, 2021, 02:32:45 AM

Title: Which process is NOT a step in the catabolism of an even-chain fatty acid?
Post by: Judy on April 11, 2021, 02:32:45 AM

Which process is NOT a step in the catabolism of an even-chain fatty acid?
a) formation of a thioester linkage involving a fatty acyl molecule
b) catlyaztion of a transesterification rxn by CAT II
c) isomerization of a cis-Δ3-double bond to a trans-Δ2-double bond
d) cleavage by thiolase yielding two acetyl-CoA molecules
e) dehydrogenationb by acyl-CoA dehydrogenase yielding NADH

The answer is E. However I think B should be the correct answer.  Can someone help me solve this?
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Title: Re: Which process is NOT a step in the catabolism of an even-chain fatty acid?
Post by: Babcock_Hall on April 11, 2021, 09:35:51 AM

It is a forum rule that you must show your attempt at solving a problem before we can help you.  However, I will give you a little bit of direction, inasmuch as you have started to explain your thinking.  CAT II is the enzyme that turns a carnitine ester of a fatty acid into a CoA thioester of a fatty acid after it has traversed the membrane.

Title: Re: Which process is NOT a step in the catabolism of an even-chain fatty acid?
Post by: Judy on April 11, 2021, 10:58:27 AM

@ Babcock_Hall
Thank you! I got it.