Question

Enzymes, Vitamins and hormones are common in
A. Proteinaceous
B. Beings synthesized in the body organisms
C. Enhancing oxidative metabolism
D. Regulating metabolism

Answer 1

Hint: Various metabolic reactions in the body of any living organism require enzymes, hormones, and some vitamins in the form of cofactors to maintain the rate of reaction, to inhibit the reaction, or to accelerate the rate of reaction.

Complete Answer:
Let us find the correct answer,
All enzymes are proteins , but all vitamins are not protein in nature and some hormones are protein, some are only small peptides, some hormones are steroids such as testosterone, progesterone, thus option A is not the correct answer.

All vitamins do not get synthesized in the body, though almost all enzymes and hormones are normally synthesized in a healthy body, Thus option B is not the correct answer.

Enzymes are known to increase the rate of reaction, but they may reverse any reaction, and hormones suppress some reactions in the body, and they also accelerate some reactions. Thus option C is not correct.

Option D is the correct answer, because by decreasing or increasing the rate of any reaction, by working according to the feedback mechanism, any hormone or enzymes can suppress or accelerate the rate of any reaction in the body, and the vitamins acts as cofactors for many different enzymes, so the also participate in regulating the metabolism.

Hence the correct answer is option D.

Note: Any reaction in the body needs to be operated in a regulated manner, because the excess of the product of the reaction or the lack of the product that is being formed after the reaction is harmful for the normal functioning of the healthy body. So, to maintain the reactions the regulation is being done by hormones, enzymes, vitamins and various other mechanisms.