Select the correct products of Krebs cycle with respect to the complete breakdown of two acetyl - CoA molecules

Options

A. `6NADH_2,2FADH_2,2GTP`
B. `3NADH_2,1FADH_2,1GTP`
C. `8NADH_2,2FADH_2,2GTP`
D. `6NADH_2,1FADH_2,2GTP`

Answer

To determine the correct products of the Krebs cycle (also known as the citric acid cycle or TCA cycle) with respect to the complete breakdown of two acetyl-CoA molecules, we need to analyze the cycle's output based on the input of acetyl-CoA.

### Step-by-Step Solution:

1. **Understanding the Input:**
- Each acetyl-CoA molecule enters the Krebs cycle. For this question, we have **two acetyl-CoA molecules**.

2. **Products from One Acetyl-CoA:**
- When one acetyl-CoA enters the Krebs cycle, the following products are generated:
- **3 NADH**
- **1 FADH2**
- **1 GTP (or ATP)**

3. **Calculating for Two Acetyl-CoA:**
- Since we have two acetyl-CoA molecules, we will double the products:
- **NADH:** 3 NADH x 2 = **6 NADH**
- **FADH2:** 1 FADH2 x 2 = **2 FADH2**
- **GTP:** 1 GTP x 2 = **2 GTP**

4. **Final Products:**
- Therefore, the total products from the complete breakdown of two acetyl-CoA molecules in the Krebs cycle are:
- **6 NADH**
- **2 FADH2**
- **2 GTP**

5. **Selecting the Correct Option:**
- Among the options given in the question, the correct answer is:
- **6 NADH, 2 FADH2, and 2 GTP.**

### Conclusion:
The correct products of the Krebs cycle with respect to the complete breakdown of two acetyl-CoA molecules are **6 NADH, 2 FADH2, and 2 GTP**.