Photosynthesis is

Options

A. Anabolic, exergonic, and oxidation-reduction process
B. Catabolic, exergonic , and oxidation -reduction process
C. Anabolic, endergonic , and oxidation-reduction process
D. Catabolic , endogonic , and oxidation -reduction process

Answer

### Step-by-Step Solution

1. **Definition of Photosynthesis**: Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy in the form of glucose. This process occurs primarily in the chloroplasts of plant cells.

2. **Anabolic vs. Catabolic**:
- **Anabolic Processes**: These are constructive metabolic processes where smaller molecules are combined to form larger, more complex molecules. In photosynthesis, carbon dioxide and water are combined to form glucose, which is a larger molecule.
- **Catabolic Processes**: These involve the breakdown of larger molecules into smaller ones, releasing energy in the process. Since photosynthesis builds glucose from smaller molecules, it is not a catabolic process.

3. **Conclusion on Anabolic vs. Catabolic**: Since photosynthesis constructs glucose from carbon dioxide and water, it is classified as an **anabolic process**.

4. **Exergonic vs. Endergonic**:
- **Exergonic Processes**: These reactions release energy to the surroundings.
- **Endergonic Processes**: These reactions absorb energy from the surroundings. Photosynthesis requires energy (in the form of sunlight) to convert carbon dioxide and water into glucose, which means it absorbs energy.

5. **Conclusion on Exergonic vs. Endergonic**: Since photosynthesis absorbs energy, it is classified as an **endergonic process**.

6. **Oxidation-Reduction Process**:
- In photosynthesis, water (H2O) is oxidized (loses electrons) and carbon dioxide (CO2) is reduced (gains electrons) to form glucose (C6H12O6). This means that photosynthesis involves both oxidation and reduction reactions.

7. **Final Classification**: Therefore, photosynthesis is an **anabolic process**, an **endergonic process**, and involves **oxidation-reduction reactions**.

### Summary
Photosynthesis is an anabolic process that absorbs energy (endergonic) and involves oxidation-reduction reactions.

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