The cell wall of fungi is composed of: MCQ with Answer and Explanation

Explanation:
Vitamin C (ascorbic acid) is a water-soluble antioxidant that also acts as a cofactor for enzymes involved in collagen synthesis, carnitine synthesis, and neurotransmitter production. Deficiency causes scurvy. Vitamin A is for vision, D for bone, K for clotting. Smokers require higher vitamin C intake due to oxidative stress.

Explanation:
Robert Brown, a Scottish botanist, first described the nucleus in 1831 while studying epidermal cells of orchids. Hooke discovered cells, Leeuwenhoek observed living cells, Virchow proposed that cells arise from pre-existing cells. Brown's discovery was pivotal for understanding cellular organization.

Explanation:
The cell theory states that all organisms are composed of one or more cells, and the cell is the fundamental structural and functional unit of life. The reason directly supports the assertion. Thus, both are true and the reason correctly explains the assertion.