Question

17. If a hypothetical 10 carbon long fatty acid was metabolized by the beta oxidation pathway, how many cycles of the pathway would be required to completely break down the fatty acid to the end products of beta oxidation?

A. 10

B. 1

C. 2

D. 4

Answer 1

Answer:

Correct option: D. 4

Explanation:

• Beta oxidation is break down of fatty acids.
• The end product of beta oxidation is Acetyl co.A. (acetyl coenzyme A)
• Acetyl co.A is 2 Carbon containing compound.
• In each cycle of beta oxidation, 2 carbons are removed in the form of Acetyl.co.A
• So for the fatty acid with 10 carbons, it will take 4 cycle of beta oxidation.
• in first cycle, C10 fatty acid chain will be converted to C8
• in second cycle, C8 fatty acid chain will be converted to C6
• in third cycle, C6 fatty acid chain will be converted to C4
• in fourth cycle, C4 fatty acid chain will be converted to two molecules of C2 - acetyl co.A