- Which of the following combinations of biologically active molecules does vitamin A consists of?
a) Retinol, retinal and retinoic acid
b) Retinol, retinal and tetra-hydro-folate
c) Retinal, conjugase and retinoic acid
d) PABA, retinol and retinal-aldehyde
Explanation:
Biologically active forms of Vitamin A:
Retinol
Retinal
Retinoic acid
Beta carotene
Important points:
The retinoids are related to retinol (Vitamin A) are essential for vision, reproduction, growth and maintenance of epithelial tissues.
Answer: Retinol, retinal and retinoic acid
Ref: Harper 30th Ed. Page-