Photorespiration

Question

Photorespiration
A)occurs in C4 plants.
B)uses the enzyme PEP carboxylase rather than rubisco to produce 3-phosphoglycerate.
C)tends to occur under dry and hot conditions.
D)requires CO2.
E)uses a 3-carbon sugar precursor to produce oxygen.

Accepted Answer

Photorespiration tends to occur under dry and hot conditions, as it is a process that occurs when there is insufficient carbon dioxide available for the Calvin cycle, which is more likely to occur in these types of conditions.

Answer: E
 During photorespiration, rubisco mistakenly binds to oxygen instead of carbon dioxide, producing a 2-carbon compound that is later converted into a 3-carbon sugar precursor. This process ultimately leads to the production of oxygen, which is not a desired product of photosynthesis.