Which of the following is the primary function of the Smooth Endoplasmic Reticulum (SER)? MCQ with Answer and Explanation

Explanation:
Estrogen, secreted by the developing ovarian follicles, promotes the development of female secondary sexual characteristics such as breast development, widening of hips, and distribution of body fat. Testosterone is the male sex hormone. Progesterone prepares the uterus for pregnancy, and prolactin stimulates milk production.

Explanation:
Melanin, produced by melanocytes in the epidermis, is the primary pigment determining skin, hair, and eye color. It absorbs UV radiation, protecting DNA from damage. Keratin is a structural protein in hair and nails, collagen provides connective tissue strength, elastin elasticity. Albinism results from melanin deficiency.

Explanation:
Viruses are non-living outside a host; they cannot carry out metabolic processes or reproduce independently. They hijack the host cell's machinery to replicate. Thus, they are obligate intracellular parasites. The reason correctly explains the assertion.