Q. Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these :
A) enhance oxidative metabolism
B) are conjugated proteins
C) are exclusively synthesized in the body of a living organism as at present
D) help in regulating metabolism
Explanation
[Solution from source] What enzymes, vitamins (often as coenzymes) and hormones have in common is that they control the rate and direction of metabolism. They are not all proteins (many vitamins and steroid hormones are not), and vitamins are mostly obtained from food rather than made in the body. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.