Photorespiration involves the enzyme rubisco, which can bind to both oxygen (O2) and carbon dioxide (CO2). The notation "O 2 " and "CO 2 " is a stylized way of representing oxygen (O2) and carbon dioxide (CO2), respectively. This process is considered wasteful because it can consume energy and carbon without producing sugar, contrasting with the productive photosynthesis process.

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Photorespiration

Question 66

Multiple Choice

Photorespiration:

A) is a process similar to cellular respiration, producing energy for plants.
B) occurs in equal parts with photosynthesis.
C) drives photosynthesis.
D) generates ATP.
E) is due to rubisco being able to bind O₂ as well as CO₂.

Correct Answer: