Question

During complete oxidation of the fatty acid CH3(CH2)14COOH, ________ molecules of acetyl-CoA are produced, and the fatty acid goes through the β-oxidation cycle ________ times

Answer 1

Answer:

During complete oxidation of the fatty acid CH3(CH2)14COOH, eight molecules of acetyl-CoA are produced, and the fatty acid goes through the β-oxidation cycle seven times.

Explanation:

In the β-oxidation of fatty acids, an acetyl-CoA molecule is removed from the fatty acid chain after every β-oxidation cycle that the fatty acid undergo, leaving behind a fatty acyl-CoA molecule shortened by two cabon atoms..

The removal of the acetyl-CoA molecule starts from the carboxyl end and shortens the fatty acid molecule by two carbon units. Successive β-oxidation cycles results in the complete oxidaton of the fatty acid molecle to acetyl -CoA molecules.

The compound CH3(CH2)14COOH, is a 16-carbon saturated fatty acid molecule known as palmitic acid.. It undergoes seven passes through the β-oxidation cycle to yield eight molecules of acetyl-CoA with each cycle yielding an acetyl-CoA molecule and a fatty acyl-CoA shortened by two carbon atoms. Finally, the seventh step yields two acetyl-CoA molecules.

Answer 2

During complete oxidation of CH3(CH2)14COOH, eight (8) molecules of acetyl-CoA are produced, and the fatty acid goes through the β-oxidation cycle seven (7) times.

• Cellular respiration refers to a series of metabolic reactions by which aerobic cells use the energy stored in the chemical bonds of foods and oxygen to produce ATP and carbon dioxide.

• Cellular respiration has three stages: glycolysis, the Krebs cycle  (also called TCA or tricarboxylic acid cycle) and oxidative phosphorylation.

• During the TCA cycle, a fatty acid containing a hydrocarbon tail of N atoms of carbons undergoes an amount of (N/2)−1 rounds of β-oxidation to be oxidized.

• Palmitic acid [chemical formula: CH3(CH2)14COOH] is a fatty acid with 16 carbon atoms in which 7 successive rounds of oxidation must take place to produce 8 acetyl-CoA molecules.

In conclusion, during complete oxidation of CH3(CH2)14COOH, eight (8) molecules of acetyl-CoA are produced, and the fatty acid goes through the β-oxidation cycle seven (7) times.

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