During photorespiration the oxygen consuming reaction (s) occur in:

Stroma of chloroplasts and mitochondria

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Stroma of chloroplasts and peroxisomes

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Grana of chloroplasts and peroxisomes

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Stroma of chloroplasts

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Solution

The correct option is B Stroma of chloroplasts and peroxisomes
The first reaction of photorespiration happens in the stoma of the chloroplasts. In this reaction, RuBP consumes one molecule of oxygen in the presence of the enzyme Rubisco.
In peroxisomes, the glycolate transferred from chloroplasts takes up oxygen and forms glyoxylate, with water being release as a byproduct.

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