The largest bone in the human body is: MCQ with Answer and Explanation

Explanation:
PCR, invented by Kary Mullis, allows exponential amplification of a specific DNA segment using a thermostable DNA polymerase (Taq polymerase), primers, and thermal cycling. Gel electrophoresis separates DNA fragments, Southern blotting detects specific sequences, DNA sequencing determines the order of bases. PCR is widely used in diagnostics, forensics, and research.

Explanation:
Pepsin is the primary proteolytic enzyme in the stomach, breaking down proteins into peptones. Trypsin is a pancreatic enzyme secreted by the pancreas, not the liver, which continues protein digestion in the small intestine. Bile, produced by the liver, emulsifies fats, but lipase (pancreatic lipase) actually digests (hydrolyzes) them into fatty acids and glycerol. Only statement 1 is correct.

Explanation:
Sclerenchyma provides strength, with thick lignified walls; cells are usually dead at maturity. Xylem transports water, phloem transports food, collenchyma is living with uneven thickening.