Oxygen transport in the blood is primarily by: MCQ with Answer and Explanation

Explanation:
Rennin (chymosin) is a proteolytic enzyme found in the gastric juice of young mammals; it curdles milk by converting soluble caseinogen into insoluble casein, slowing its passage and allowing pepsin to digest it. Pepsin is the main adult protease, trypsin is pancreatic, and lipase digests fats. Rennin is now produced biotechnologically for cheese making.

Explanation:
Secondary structure refers to local folding patterns like α-helices and β-sheets. Primary is amino acid sequence; tertiary is 3D folding; disulfide bonds are tertiary/quaternary; denaturation disrupts non-covalent bonds, not peptide bonds.

Explanation:
Gene therapy is an experimental technique that involves introducing genes into a patient's cells to correct or compensate for genetic defects causing disease. Transgenic animals have had their genome deliberately altered by the insertion of foreign DNA from another species. Biopesticides, derived from natural materials like bacteria, plants, or minerals, are generally target-specific and non-toxic to humans and the environment, unlike synthetic chemical pesticides. Thus, statements 1 and 2 are correct.