The organ that produces digestive enzymes and insulin is the: MCQ with Answer and Explanation

Explanation:
Approximately 97% of O₂ is transported bound to hemoglobin (as oxyhemoglobin), while only 3% is dissolved in plasma. Each hemoglobin molecule can bind four O₂ molecules cooperatively. CO₂ is mainly transported as bicarbonate (70%), carbaminohemoglobin (23%), and dissolved (7%). The affinity of hemoglobin for O₂ is influenced by pH, CO₂, and temperature (Bohr effect).

Explanation:
Mitosis is an equational division resulting in two genetically identical diploid daughter cells, not four. Meiosis is a reductional division involving two successive stages, meiosis I and meiosis II, producing four haploid cells. Crossing over, the exchange of genetic material, occurs exclusively during the pachytene stage of prophase I in meiosis, not in mitosis. Only statement 2 is correct.

Explanation:
Gel electrophoresis, especially agarose gel electrophoresis, separates DNA, RNA, or protein fragments based on size and charge under an electric field. Smaller fragments move faster through the gel matrix. Centrifugation separates by density, chromatography by differential partitioning, spectrophotometry measures light absorption. Electrophoresis is a fundamental tool in molecular biology.