Question

Carbohydrates aid fat metabolism by:

A. Donating acetyl-CoA during beta-oxidation

B. Generating pyruvate needed to form oxaloacetate which keeps the citric acid cycle turning as fats form acetyl-CoA

C. Preventing the formation of ketones by generating acetyl-CoA

D.Generating glucose which provides energy needed for beta-oxid ation which forms acetyl-CoA for the citric acid cycle

Answer 1

Option B- Generating pyruvate needed to form oxaloacetate which keeps the citric acid cycle turning as fats form acetyl-CoA

In fat metabolism , the fat(triglyceride) is digested in to Fatty aci and glycerol.

Fattyacid is further metabolized for the generation of energy

Normally fat metabolism occurs when the Carbohydrate level in the body is Low.

The best substrate for the production of energy is glucose.if it is deficient then the fat is metabolized for energy production

Fatty acid is metabolized by a process called Beta oxidation .

Because the oxidation is taking place in the beta carbon of fatty acid.

In beta oxidation fatty acid is converted in to Acetyl coA molecules by a regular cyclic process

End products of beta oxidation are Acetyl CoA molecule, NADH,FADH2

The Acetyl coA generated enter the krebs cycle for the production of more energy

NADH and FADH2 enter the electron transport chain for converting it in to the ATP molecules

For the proper functioning of Krebs cycle acetyl coA is not enough, Along with acetyl coA oxaloacetate also needed.

Oxaloacetate is produced from the pyruvic acd with the help of pyruvate carboxylase enzyme

This enzyme carboxylate the pyruvate in to oxaloacetate.

This oxaloacetate will combine with the Acetyl coA produced from the beta oxidation of fatty acid for the production of energy.