Dark reaction in photosynthesis is called so because

Options

A. it can occur in dark also
B. it does not depend on light energy
C. it cannot occur during day light
D. it occurs more rapidly at night

Explanation

**Step-by-Step Solution:**

1. **Understanding Photosynthesis**: Photosynthesis consists of two main stages: the light-dependent reactions and the light-independent reactions (commonly referred to as the dark reactions).

2. **Defining Dark Reactions**: The dark reactions, also known as the Calvin cycle, occur in the stroma of chloroplasts. They do not require light directly to proceed.

3. **Reason for the Name**: The term "dark reaction" is somewhat misleading. It is called so because it does not require light energy to occur. Instead, it utilizes the ATP and NADPH produced during the light-dependent reactions.

4. **Light Independence**: The dark reactions can take place in the absence of light, meaning they can occur at any time of the day or night, as long as the necessary substrates (like carbon dioxide) and energy carriers (ATP and NADPH) are available.

5. **Conclusion**: Therefore, the dark reaction in photosynthesis is called so because it does not depend on light energy to occur.

**Final Answer**: The dark reaction in photosynthesis is called so because it does not depend on light energy.

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