Identify the correct statement about genetic drift: MCQ with Answer and Explanation

Explanation:
Vitamin B₆ exists in three forms: pyridoxine, pyridoxal, and pyridoxamine. Its active form, pyridoxal phosphate (PLP), is a coenzyme in amino acid metabolism and neurotransmitter synthesis. Deficiency can cause peripheral neuropathy and anemia.

Explanation:
Insulin-like Growth Factor 1 (IGF-1), also known as somatomedin C, is a peptide hormone structurally similar to insulin. It is primarily synthesized and secreted by the liver (and to a lesser extent by other tissues) in response to stimulation by Growth Hormone (GH). IGF-1 mediates most of the growth-promoting (anabolic) effects of GH. It stimulates the proliferation and differentiation of chondrocytes (cartilage cells) in the epiphyseal plates of bones, promotes protein synthesis in muscles, and supports the growth of various other tissues.

Explanation:
Thymosin is a group of peptide hormones secreted by the epithelial cells of the thymus gland. The thymus is the primary site for the maturation of T-lymphocytes (T cells), which are essential for cell-mediated immunity. Thymosin plays a critical role in this process by promoting the differentiation, development, and maturation of immature T cells (thymocytes) into functional, immunocompetent T cells. As the thymus involutes (shrinks) after puberty, thymosin levels decline.