Green plants kept in light produce ATP from glucose. The process is

Options

A. Photophosphorylation
B. Glycolysis
C. TCA cycle
D. Oxidative phosphorylation.

Answer

To solve the question regarding the process by which green plants kept in light produce ATP from glucose, we can follow these steps:

### Step 1: Understand the question
The question asks about the process that occurs in green plants when they are exposed to light and produce ATP from glucose.

### Step 2: Identify the options
The options provided are:
1. Photophosphorylation
2. Glycolysis
3. PCA cycle (TCA cycle or Krebs cycle)
4. Oxidative phosphorylation

### Step 3: Analyze each option
- **Photophosphorylation**: This process occurs in the chloroplasts during photosynthesis, where light energy is used to add a phosphate group to ADP to form ATP. However, it primarily involves the conversion of light energy and water, not glucose.

- **Glycolysis**: This is the process where glucose is broken down into pyruvate, producing a small amount of ATP. It does not directly involve light energy.

- **PCA cycle (TCA cycle or Krebs cycle)**: This cycle occurs in the mitochondria and involves the oxidation of acetyl CoA. It does not directly involve glucose or light.

- **Oxidative phosphorylation**: This is the process that occurs in the mitochondria, where ATP is produced through the electron transport chain and chemiosmosis, using energy derived from the oxidation of nutrients. However, it is not directly linked to glucose in the presence of light.

### Step 4: Determine the correct answer
Since the question specifies that the process occurs in green plants kept in light and involves glucose, the most appropriate answer is **photophosphorylation**. This is because, in the presence of light, plants can convert light energy into chemical energy, which includes the production of ATP.

### Conclusion
The correct answer to the question is **photophosphorylation**.

---