Among light and dark reaction which reaction is more temperature affected?

Answer

To determine which reaction between light and dark reactions of photosynthesis is more affected by temperature, we can follow these steps:

### Step 1: Understand the Processes
- **Light Reactions**: These occur in the thylakoid membranes of chloroplasts and involve the conversion of light energy into chemical energy in the form of ATP and NADPH.
- **Dark Reactions (Calvin Cycle)**: These occur in the stroma of chloroplasts and involve the fixation of carbon dioxide to produce glucose using ATP and NADPH generated in the light reactions.

### Step 2: Analyze Temperature Sensitivity
- **Light Reactions**: They are primarily driven by light energy and do not involve enzymatic reactions. As a result, they are less sensitive to temperature changes.
- **Dark Reactions**: These reactions are enzymatic and involve several enzymes that facilitate the conversion of carbon dioxide into glucose. Enzymatic reactions are known to be sensitive to temperature, as they can be affected by changes in temperature that influence enzyme activity.

### Step 3: Conclusion
- Since the dark reactions are enzymatic and thus more sensitive to temperature changes, we conclude that the **dark reaction** is more temperature affected compared to the light reaction.

### Final Answer
The dark reaction is more temperature affected than the light reaction.

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