Consider statements about the cell wall: 1. Plant cell walls are made of cellulose. 2. Fungal cell walls contain chitin. 3. Bacterial cell walls contain peptidoglycan. Which are correct? MCQ with Answer and Explanation

Explanation:
Vitamin C is a cofactor for prolyl and lysyl hydroxylases, enzymes essential for collagen cross-linking and stability. Deficiency impairs wound healing and causes scurvy. Vitamin A is for epithelial integrity.

Explanation:
DNA fingerprinting analyzes unique patterns in an individual's DNA (VNTRs) and is widely used in forensics for identifying criminals or establishing paternity. Human insulin (Humulin) was the first genetically engineered therapeutic protein, produced in E. coli in 1982. Bt brinjal is genetically modified to express Bt toxin for resistance against specific insect pests (like the fruit and shoot borer), not herbicides. Thus, statements 1 and 2 are correct.

Explanation:
Pellagra, with the 3 Ds (dermatitis, diarrhea, dementia), is due to deficiency of niacin (vitamin B₃) or tryptophan. Beriberi is B₁, scurvy C, rickets D. Niacin is part of NAD and NADP.