The vitamin that acts as a coenzyme in transamination reactions is: MCQ with Answer and Explanation

Explanation:
Nitrous acid (HNO₂) is a chemical mutagen that can deaminate bases (e.g., cytosine to uracil), causing base-pair changes and mutations. X-rays, UV radiation, and gamma rays are physical mutagens (ionizing and non-ionizing radiation). Chemical mutagens include base analogs, alkylating agents, and intercalating agents. Mutagens increase the rate of mutations beyond natural levels.

Explanation:
Fertilization in humans typically occurs in the fallopian tube (ampullary region), not the uterus; the zygote then travels to the uterus for implantation. The placenta is the vital organ providing oxygen and nutrients to the growing fetus and removing waste. Spermatogenesis, the production of sperm, occurs in the seminiferous tubules of the testes. Thus, statements 2 and 3 are correct.

Explanation:
Mendel's dihybrid cross (e.g., yellow round × green wrinkled) gave a 9:3:3:1 phenotypic ratio in the F₂ generation, illustrating independent assortment.