The technique used to detect specific proteins in a tissue section using labeled antibodies is: MCQ with Answer and Explanation

Explanation:
Crossbreeding involves mating individuals of different breeds to combine desirable traits and exploit hybrid vigor (heterosis). Inbreeding is within the same breed, outcrossing is within breed but unrelated, grading up is repeated crossing with a superior breed. Crossbreeding improves productivity in dairy and meat animals.

Explanation:
Ion exchange chromatography separates proteins based on their net surface charge; positively charged proteins bind to cation exchangers, negatively to anion exchangers. Gel filtration separates by size, affinity by specific binding, SDS-PAGE by molecular weight.

Explanation:
Pyridoxal phosphate (PLP), the active form of vitamin B₆, is a coenzyme for transaminases (ALT, AST), decarboxylases, and other enzymes in amino acid metabolism. Thiamine in decarboxylation of keto acids, riboflavin in redox, niacin in NAD/NADP.