Which b-vitamin metabolizes into a coenzyme involved in ketone metabolism?

The correct answer is pantothenic acid.

The formation of ketone bodies in the body generally takes place at the time of deficiency of pantothenic acid. The addition of this vitamin would encourage complete catabolism of fatty acids and thus the production of ketone bodies could be avoided.

Pantothenic acid, also known as vitamin B5, is one of the most essential vitamins in the life of humans. It is essential for making cells of blood, and it assists in transforming the food one eats into energy.

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step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.