The bacterium used in the production of Swiss cheese (for holes) is: MCQ with Answer and Explanation

Explanation:
Secretin is a peptide hormone released by the S cells of the duodenal mucosa in response to acidic chyme entering from the stomach. Its primary action is to stimulate the pancreatic ductal cells to secrete a large volume of water and bicarbonate ions. This alkaline juice neutralizes the acidic chyme, providing the optimal pH for pancreatic digestive enzymes to function. Cholecystokinin (CCK) stimulates enzyme secretion.

Explanation:
Fertilization typically occurs in the ampulla, the widest region of the fallopian tube, where the sperm meets the secondary oocyte. The zygote then travels to the uterus for implantation. The ovary releases the egg, the uterus supports embryo development, the cervix is the lower portion opening into the vagina.

Explanation:
During the light reactions of photosynthesis, photolysis of water occurs at photosystem II, splitting water into protons, electrons, and molecular oxygen. The oxygen comes from water, not CO₂. This was demonstrated by using isotopically labeled oxygen (H₂O¹⁸). Glucose is formed in the Calvin cycle. Chlorophyll absorbs light but does not provide oxygen. The overall equation: 6CO₂ + 12H₂O → C₆H₁₂O₆ + 6O₂ + 6H₂O.