The Question is from neet-botany photosynthesis-in-higher-plants , and it was created by the author NISHANTH

Question

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

NISHANTH · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
**Primary Concept**: Photorespiration, specifically the location of its oxygen-consuming reactions.
**Related Topics**: Cellular organelles (chloroplasts, peroxisomes, mitochondria), plant metabolism
**Prerequisites**: Basic knowledge of plant cell structure and the process of photorespiration.
## SOLUTION PATHWAY
**Given Information**:
   * The question asks about the location of oxygen consumption during photorespiration.
**Method & Steps**:
 1. Recall the steps of photorespiration:
    Reasoning: Photorespiration involves multiple organelles, and the oxygen-consuming step happens in chloroplasts and peroxisomes.
 2. Identify the correct location:
    Working: The oxygen-consuming step of photorespiration occurs when RuBisCO reacts with oxygen instead of carbon dioxide. This reaction happens in the stroma of the chloroplast. The resulting product then moves to the peroxisome for further reactions, also consuming oxygen.
**Result**: The correct answer is B.
## OPTION ANALYSIS
[A] :x: Mitochondria are not directly involved in the oxygen-consuming reactions of photorespiration. They are involved in cellular respiration.
[B] ✓: This is correct as oxygen is consumed in the stroma of chloroplasts (by RuBisCO) and in peroxisomes during photorespiration.
[C] :x: Grana are the site of light-dependent reactions in photosynthesis, not photorespiration. While peroxisomes are involved in photorespiration, it is not correct as grana is not involved.
[D] :x: While the stroma of the chloroplast is involved, the peroxisome is also a crucial site.
## LEARNING AIDS
**Common Mistakes**:
 1. Confusing photorespiration with cellular respiration: Note that the oxygen consumption in photorespiration is not the same as in mitochondrial respiration.
 2. Incorrectly identifying organelle functions: It's important to know the specific roles of chloroplasts, peroxisomes, and mitochondria in plant cells.
**Quick Tips**:
 1. Remember that photorespiration is a wasteful process that involves multiple organelles.
 2. Visualize the flow of metabolites during photorespiration to understand the involvement of different organelles.

NISHANTH · Answer

Stroma of chloroplasts and mitochondria

NISHANTH · Answer

The correct Option is "Stroma of chloroplasts and peroxisomes"

NISHANTH · Answer

Grana of chloroplasts and peroxisomes

NISHANTH · Answer

Stroma of chloroplasts

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