Question

Choose the correct answers from the alternatives given :
For fatty acids to be able to enter the pathways of cellular respiration, they must be

• A. deaminated
• B. combined with glycerol
• C. combined with ATP
• D. broken into acetyl groups

Answer 1

The correct option is D broken into acetyl groups

• Fatty acid is the main component that is used in the energy synthesis after carbohydrates as it can be easily stored
• The fatty acid also cannot direct enter the Kreb's cycle. Therefore they are to be broken down to acetyl CoA which is done by the process of beta oxidation.
• Long chain of fatty acid are broken down to the 2 carbon molecule of Acetyl CoA- for example Palmitoyl acid is converted to 8 molecules of Acetyl CoA after beta oxidation.
• Therefore for the fatty acid to take part in cellular respiration it is to be broken down into 2 carbon molecules of acetyl coA.
• Therefore the answer 'broken into acetyl groups' is correct.