Photorespiration in chloroplasts resembles cellular respiration in mitochondria in that:
A)carbon dioxide is produced in both pathways.
B)NADH is used in both pathways as the source of high-energy electrons.
C)they both store energy in the form of ATP.
D)both pathways are beneficial to the cell.

Question

Quizplus · Accepted Answer

Both photorespiration in chloroplasts and cellular respiration in mitochondria produce carbon dioxide as a byproduct. However, NADH is used as the source of high-energy electrons only in cellular respiration, while photorespiration in chloroplasts uses NADPH. Both pathways do store energy in the form of ATP, but only cellular respiration is necessary for the cell's survival. Photorespiration is actually considered to be a wasteful process for the plant, as it decreases the efficiency of photosynthesis. Therefore, the best choice is A.

Photorespiration in Chloroplasts Resembles Cellular Respiration in Mitochondria in That