Photosynthesis Fundamentals

Steps:

• Recall photosynthesis equation: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, occurring in chloroplasts.
• Evaluate A: Check if process is exothermic (negative ΔH) or endothermic (positive ΔH).
• Evaluate B: Identify biological catalyst involved.
• Evaluate C and D: Confirm primary site and products.

Why D is correct:

• Photosynthesis occurs in chloroplasts of green leaves, where chlorophyll absorbs light for the reaction.

Why the others are wrong:

• A: Photosynthesis is endothermic with positive enthalpy change, as it requires light energy input.
• B: It is catalyzed by chlorophyll enzymes, not yeast, which ferments sugars.
• C: Primary products are glucose and oxygen; starch is a storage form, not direct output.

Final answer: D