Photorespiration

Question 1

What occurs when Rubisco binds O₂ instead of CO₂?

Answer 1

Photorespiration

Photorespiration is a process that counteracts photosynthesis.

Question 2

Under what conditions does photorespiration occur?

Answer 2

When stomata are closed, such as during water stress or heat

Stomata closure restricts CO₂ intake, leading to increased O₂ concentration.

Question 3

What is produced as a result of photorespiration?

Answer 3

A 2C compound

This 2C compound is subsequently recycled in mitochondria.

Question 4

What are the consequences of photorespiration?

Answer 4

Wastes energy and loses carbon, resulting in reduced photosynthesis and growth

This inefficiency can significantly impact plant health and productivity.

Question 5

Which adaptations help avoid photorespiration?

Answer 5

C4 and CAM adaptations

These adaptations allow plants to efficiently fix carbon and minimize photorespiration.