The vitamin that is part of coenzyme A and is involved in acyl group transfer is: MCQ with Answer and Explanation

Explanation:
Typhoid is caused by the bacterium Salmonella typhi, transmitted through contaminated food and water. Influenza (flu) is a viral disease, malaria is protozoan (Plasmodium), AIDS is viral (HIV). Common bacterial diseases include cholera, tuberculosis, diphtheria, tetanus. Typhoid fever is characterized by prolonged fever, headache, and rose spots on the skin. Widal test is used for diagnosis.

Explanation:
Iodine is incorporated into thyroxine (T₄) and triiodothyronine (T₃) synthesized by the thyroid gland. Deficiency leads to goiter and hypothyroidism. Iron is in hemoglobin, zinc in insulin and enzymes, cobalt in B₁₂.

Explanation:
The vascular cambium is a thin layer of meristematic cells located between the primary xylem and primary phloem in the vascular bundles of dicot stems and roots, and in the secondary vascular tissue. It is a lateral meristem that divides periclinally (parallel to the surface). It produces secondary xylem (wood) cells towards the inside (center) of the stem or root, and secondary phloem (inner bark) cells towards the outside (periphery). Since it produces xylem much faster than phloem, the secondary xylem accumulates and forms the bulk of the wood.