If light is available for a given duration and then again made unavailable , the biosynthetic process will

Options

A. continue for long duration.
B. continue for unlimited time.
C. continue for short duration.
D. will stop immediately

Answer

To solve the question regarding the biosynthetic process in photosynthesis when light is available for a certain duration and then made unavailable, we can follow these steps:

### Step-by-Step Solution

1. **Understanding Photosynthesis**: Photosynthesis consists of two main phases: the light-dependent reactions (light phase) and the light-independent reactions (dark phase or biosynthetic phase). The light phase captures energy from sunlight and converts it into chemical energy in the form of ATP and NADPH.

2. **Role of ATP and NADPH**: The biosynthetic phase, also known as the Calvin cycle, uses the ATP and NADPH produced during the light phase to convert carbon dioxide into glucose. This phase does not require light directly but relies on the energy stored in ATP and NADPH.

3. **Impact of Light Availability**: If light is available for a certain duration, the light-dependent reactions will produce ATP and NADPH. Once the light is turned off, these energy carriers will still be present for a limited time.

4. **Duration of Biosynthetic Process**: The biosynthetic process (Calvin cycle) will continue as long as there is sufficient ATP and NADPH available. However, these energy carriers will not last indefinitely. Once they are used up, the biosynthetic process will cease.

5. **Conclusion**: Therefore, if light is made unavailable after a certain duration, the biosynthetic process will continue for a short duration until the stored energy (ATP and NADPH) is depleted.

### Final Answer
The correct option is: **continue for short duration**.

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