During light dependent reaction light energy in coverted to chemical potential energy through the process of chemosis in the chloroplasts which of the following statement about this process is false
I the electron carriers of phosphyorylation are located int he thylakoid
II During phosphorylaton the chloroplast stroma becomes more acidic than the interior of thylakoid membrane
III protons diffuce through the protein channels which are ATP synthetase molecules
IV ATP is forme form ADP +Pi ion the stroma side of the thylakoid in the chloroplast
V During phosphorylation water ionizes to from `H^(+)+2OH^(-)` yielding an `e^(-)` to PSII

Options

A. I,II,V
B. only II
C. III ,IV
D. only IV

Answer

To determine which statement about the light-dependent reactions of photosynthesis is false, we will analyze each statement one by one.

1. **Statement I**: "The electron carriers of phosphorylation are located in the thylakoid."
- This statement is **true**. The electron carriers, such as cytochrome and plastocyanin, are indeed located in the thylakoid membrane where they facilitate the electron transport chain.

2. **Statement II**: "During phosphorylation, the chloroplast stroma becomes more acidic than the interior of the thylakoid membrane."
- This statement is **false**. During the light-dependent reactions, protons (H⁺ ions) accumulate in the thylakoid lumen, making it more acidic compared to the stroma. Therefore, the stroma actually becomes less acidic (more basic) than the thylakoid lumen.

3. **Statement III**: "Protons diffuse through the protein channels which are ATP synthetase molecules."
- This statement is **true**. Protons that accumulate in the thylakoid lumen do diffuse through ATP synthase, leading to the production of ATP from ADP and inorganic phosphate.

4. **Statement IV**: "ATP is formed from ADP + Pi on the stroma side of the thylakoid in the chloroplast."
- This statement is **true**. ATP is synthesized on the stroma side of the thylakoid membrane as protons flow through ATP synthase.

5. **Statement V**: "During phosphorylation, water ionizes to form H⁺ + 2OH⁻, yielding an e⁻ to PSII."
- This statement is **true**. Water undergoes photolysis, producing protons and electrons, which are then used in the photosystem II (PSII) reaction.

Based on the analysis, the false statement is **Statement II**.

### Summary of the Solution:
- **False Statement**: II - "During phosphorylation, the chloroplast stroma becomes more acidic than the interior of the thylakoid membrane."