The correct sequences of electron acceptor in ATP synthesis is

Options

A. `"Cyt "a,a_(3),b,c`
B. `"Cyt "b,c,a,a_(3)`
C. `"Cyt "c,b,a,a_(3)`
D. `"Cyt "b,c,a_(3),a.`

Answer

To answer the question regarding the correct sequence of electron acceptors in ATP synthesis, we will follow these steps:

### Step 1: Understand the Structure of Mitochondria
- The mitochondria have an inner membrane that is folded into structures called cristae. This is where the electron transport chain (ETC) is located.

**Hint:** Remember that the inner membrane's structure is crucial for its function in ATP synthesis.

### Step 2: Identify the Role of the Electron Transport Chain
- The electron transport chain is responsible for the process of oxidative phosphorylation, which is the primary method of ATP production in aerobic respiration.

**Hint:** Focus on the connection between the electron transport chain and ATP synthesis.

### Step 3: Recognize the Final Electron Acceptor
- In the electron transport chain, oxygen serves as the terminal electron acceptor. This is essential because it combines with electrons and protons to form water.

**Hint:** Think about why oxygen is vital for aerobic respiration.

### Step 4: Sequence of Electron Carriers
- The sequence of electron carriers in the electron transport chain is as follows:
1. Cytochrome B
2. Cytochrome C1
3. Cytochrome C
4. Cytochrome A
5. Cytochrome A3

**Hint:** Memorize the order of cytochromes to understand how electrons flow through the chain.

### Step 5: Identify the Correct Option
- Based on the sequence identified, the correct answer to the question is option number 2, which lists the electron carriers in the correct order.

**Hint:** Cross-check the given options with the sequence you derived to confirm the correct answer.

### Final Answer
The correct sequence of electron acceptors in ATP synthesis is:
**Cytochrome B → Cytochrome C1 → Cytochrome C → Cytochrome A → Cytochrome A3** (Option 2).