Question

Select the phrase that best completes this sentence. Acetyl-CoA in a liver cell can be used

a-to make pyruvate, fatty acids, and ketone bodies

b-in the citric acid cycle and to create fatty acids and ketone bodies

c-to make ketone bodies, but not fatty acids or pyruvate

d-in the citric acid cycle and to make pyruvate

Answer 1

The correct option is b.

Acetyl-coA in the liver cell can be used in the citric acid cycle and to create fatty acids and ketone bodies.

Acetyl-coA is a molecule that conveys the carbon atom from glycolysis to the citric acid cycle to be oxidized for energy production. Pyruvate from glycolysis is first converted to acetyl coA which enters the citric acid cycle.

Many respiratory intermediates are produced in the process of respiration one of which is fatty acid produced from acetyl coA.

In the liver cell acetyl coA is used to produce ketone bodies as an alternative for fuel source for the brain and heart during the situation of carbohydrate scarcity.