BIOMOLECULES AND ENZYMES

BIOLOGY

VITAMINS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
. Which of the following is a component of the coenzyme A?
A
Retinol
B
Pantothenic acid
C
Pyridoxine
D
None of the above
Explanation: 

Detailed explanation-1: -Pantothenic acid is a component of Coenzyme A and also the acyl carrier protein (ACP) of fatty acid synthase (see Chapter 9: Lipids on lipids for many reactions involving CoA).

Detailed explanation-2: -Which of the following is a component of the coenzyme A? Sol: (d) Pantothenic acid.

Detailed explanation-3: -Pantothenate is vitamin B5 and is the key precursor for the biosynthesis of coenzyme A (CoA), a universal and essential cofactor involved in a myriad of metabolic reactions, including the synthesis of phospholipids, the synthesis and degradation of fatty acids, and the operation of the tricarboxylic acid cycle.

Detailed explanation-4: -The aldehyde form of vitamin A, retinal, is a cofactor for apoproteins in the eye called opsins. Opsins are responsible for dim-light vision in the rods (rhodopsin) and are involved in color and bright-light vision in the cone of the retina (iodopsin).

Detailed explanation-5: -Pantothenic acid (also known as vitamin B5) is an essential nutrient that is naturally present in some foods, added to others, and available as a dietary supplement. The main function of this water-soluble B vitamin is in the synthesis of coenzyme A (CoA) and acyl carrier protein [1, 2].

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