A fatty acid undergoes complete β-oxidation to yield nine molecules of acetyl-CoA. No isomerization reactions occur. The structure of the original fatty acid was:
Question
A fatty acid undergoes complete β-oxidation to yield nine molecules of acetyl-CoA. No isomerization reactions occur. The structure of the original fatty acid was:
Solution
The β-oxidation of fatty acids involves the sequential removal of two carbon units from the carboxyl end of the fatty acid chain. Each round of β-oxidation yields one molecule of acetyl-CoA.
Given that nine molecules of acetyl-CoA are produced, this implies that the original fatty acid had 18 carbons (since each acetyl-CoA has 2 carbons).
Therefore, the structure of the original fatty acid was an 18-carbon fatty acid. This is typically known as stearic acid.
Similar Questions
β-oxidation of saturated fatty acids involves all the following molecules EXCEPT:A.FADH2.B.NADPH.C.acetoacetyl-CoA.D.β-hydroxyacyl-CoA.
or aerobic metabolism, free fatty acids must be converted to acetyl-CoA viaGroup of answer choicesthe Krebs cyclethe electron transport chainβ-oxidationthe citric acid cycle
Which molecule serves as the primer for fatty acid synthesis?A) Acetyl-CoAB) Malonyl-CoAC) PalmitateD) Acyl carrier protein (ACP)
Assertion: Fatty acid would be broken down to acetyl CoA before entering the respiratory pathway when it is used as substrate.Reason: When the organism need to synthesize fatty acid, acetyl CoA would be withdrawn from the respiratory pathway for it.
The committed step in fatty acid synthesis is catalyzed byGroup of answer choicesMalonyl CoA synthaseAcetyl CoA carboxylaseFatty acid synthaseACP synthaseNone of the above
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