The following processes occur during photosynthesis A. reduction of carbon dioxide B. the splitting of water C. the synthesis of glucose D. formation of oxygen gas E. formation of ATP. Which one of the following combinations is correct for the light phase

Options

A. A, B and C
B. C, D and E
C. A, C and D
D. B, D and E

Answer

To determine the correct combination of processes that occur during the light phase of photosynthesis, we need to analyze each option provided in the question.

### Step-by-step Solution:

1. **Understand the Light Phase of Photosynthesis**:
- The light phase, also known as the light-dependent reactions, occurs in the thylakoid membranes of chloroplasts.
- This phase requires light energy to drive the reactions.

2. **Identify Key Processes in the Light Phase**:
- **A. Reduction of Carbon Dioxide**: This occurs in the dark phase (Calvin cycle) where CO2 is fixed into glucose.
- **B. The Splitting of Water**: This is a crucial process in the light phase where water molecules are split (photolysis) to release oxygen.
- **C. The Synthesis of Glucose**: This occurs in the dark phase, not in the light phase.
- **D. Formation of Oxygen Gas**: This occurs as a byproduct of water splitting in the light phase.
- **E. Formation of ATP**: This occurs in the light phase through photophosphorylation.

3. **Select the Correct Combination**:
- From the analysis, the processes that occur during the light phase are:
- B. The Splitting of Water
- D. Formation of Oxygen Gas
- E. Formation of ATP
- Therefore, the correct combination for the light phase is B, D, and E.

### Conclusion:
The correct answer is the combination of processes B (the splitting of water), D (formation of oxygen gas), and E (formation of ATP).

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