The type of immunity resulting from the injection of ready-made antibodies is: MCQ with Answer and Explanation

Explanation:
The small intestine (duodenum, jejunum, ileum) is the primary site for enzymatic digestion (by pancreatic enzymes and brush border enzymes) and absorption of nutrients through villi. Stomach initiates protein digestion and absorbs some water/alcohol. Large intestine absorbs water and electrolytes. Esophagus moves food.

Explanation:
Polymerase chain reaction (PCR) amplifies a specific DNA segment exponentially using primers, DNA polymerase (Taq), and thermal cycling. Gel electrophoresis separates DNA by size, sequencing determines base order, microarray analyzes gene expression. PCR is crucial in cloning, diagnostics, and forensics.

Explanation:
Xanthophylls, oxygenated carotenoids, are responsible for the yellow color of egg yolk, autumn leaves, and corn. Beta-carotene is orange, lycopene red.