Question

which organelle is primarily responsible for photophosphorylation? chloroplast nucleus endoplasmic reticulum mitochondria

Explanation:

Photophosphorylation is the process of generating ATP from ADP and inorganic phosphate using light - energy in photosynthesis. Chloroplasts are the organelles where photosynthesis occurs, and photophosphorylation is a key part of the light - dependent reactions in chloroplasts. The nucleus contains genetic material and is not involved in photophosphorylation. The endoplasmic reticulum is involved in protein and lipid synthesis and not related to photophosphorylation. Mitochondria are responsible for cellular respiration and oxidative phosphorylation, not photophosphorylation.

Answer:

chloroplast