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Which one of the following is wrong in relation to photorespiration?

1. It is a characteristic of C3 plants
2. It occurs in chloroplasts
3. It occurs in daytime only
4. It is a characteristic of C4 plants

Correct answer: It is a characteristic of C4 plants

Solution

Photorespiration is associated mainly with C3 plants because Rubisco can bind oxygen in them. C4 plants concentrate CO2 around Rubisco, which greatly reduces photorespiration, so calling it a characteristic of C4 plants is wrong.

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