Primary electron acceptor in noncyclic transport is `ul(A)` located towards `ul(B)` donates its electrons to `ul(C)` , respectively are

Options

A. Pheophytin, outside of membrane ,`Q_A`
B. `A_0` , innerside of membrane , `NADP^(+)`
C. Pheophytin , innerside of membrane, PC
D. `A_0`, innerside of membrane , PC

Answer

To answer the question regarding the primary electron acceptor in noncyclic transport, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Noncyclic Photophosphorylation**:
- Noncyclic photophosphorylation is a process that occurs during photosynthesis where light energy is used to generate ATP and NADPH. This process involves the movement of electrons through a series of proteins in the thylakoid membrane.

**Hint**: Remember that noncyclic photophosphorylation involves both ATP and NADPH production.

2. **Identifying the Primary Electron Acceptor**:
- In noncyclic transport, the primary electron acceptor is **pheophytin**. Pheophytin is the first molecule that accepts electrons from the excited chlorophyll after it absorbs light energy.

**Hint**: Think about the role of pheophytin in capturing electrons immediately after chlorophyll excitation.

3. **Locating Pheophytin**:
- Pheophytin is located **outside the thylakoid membrane**. This positioning allows it to effectively accept electrons from the chlorophyll.

**Hint**: Consider the spatial arrangement of the thylakoid membrane and where electron acceptors are typically found.

4. **Electron Donation**:
- After accepting electrons, pheophytin donates these electrons to **plastoquinone (PQ)**, which is often referred to as Q in the context of the electron transport chain.

**Hint**: Remember that electron transport chains involve a series of redox reactions where electrons are passed from one molecule to another.

5. **Final Answer**:
- Therefore, the answers to the blanks in the question are:
- A: **Pheophytin**
- B: **Outside the membrane**
- C: **Plastoquinone (PQ)**

### Summary:
The primary electron acceptor in noncyclic transport is **pheophytin**, located **outside the membrane**, and donates its electrons to **plastoquinone (PQ)**.