Consider statements about vitamins: 1. Vitamin A is fat-soluble. 2. Vitamin C is water-soluble. 3. Vitamin D is synthesized in the skin. Which are correct? MCQ with Answer and Explanation
Consider statements about vitamins: 1. Vitamin A is fat-soluble. 2. Vitamin C is water-soluble. 3. Vitamin D is synthesized in the skin. Which are correct?
A. 2 and 3 only
B. 1, 2 and 3
C. 1 and 3 only
D. 1 and 2 only
Answer: Option B
Solution (By JKExamLibrary)
Vitamins are classified by their solubility. Vitamins A, D, E, and K are fat-soluble, meaning they are absorbed with dietary fats and can be stored in the body's liver and fatty tissues. Vitamins B-complex and C are water-soluble, meaning they dissolve in water and are generally not stored in significant amounts. Vitamin D (cholecalciferol) is unique because it can be synthesized endogenously in the skin when exposed to ultraviolet B (UVB) radiation from sunlight. All statements are correct.
Explanation:
Cardiac muscle has striations and contracts involuntarily. Skeletal muscle is voluntary, smooth involuntary; myelin is produced by Schwann cells (PNS) and oligodendrocytes (CNS), not neurons.
Consider statements about animal husbandry: 1. Dairy farming focuses on milk production. 2. Poultry farming focuses on meat and egg production. 3. Fisheries focus on silk production. Which are correct?
Explanation:
Dairy farming is the agricultural practice of breeding and raising livestock (like cows and buffaloes) specifically for the long-term production of milk. Poultry farming involves the rearing of domesticated birds (like chickens, ducks, and turkeys) for the production of meat (broilers) and eggs (layers). Fisheries (pisciculture) involves the breeding and rearing of fish and other aquatic organisms for food; silk production is the domain of sericulture (rearing silkworms). Thus, statements 1 and 2 are correct.
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