The net gain in EMP path way is

Options

A. `2NADH+H^(+) and 4ATP`
B. `2NADH+H^(+) and 2ATP`
C. `1NADH+H^(+) and 2ATP`
D. `1NADH+H^(+) and 1ATP`

Answer

To determine the net gain in the EMP (Embden-Meyerhof-Parnas) pathway, we need to analyze the glycolysis process, which is the main metabolic pathway involved. Here’s a step-by-step breakdown of the process:

### Step-by-Step Solution:

1. **Understanding the EMP Pathway**:
- The EMP pathway is also known as glycolysis. It is the process through which glucose is broken down to produce energy.

2. **Starting Material**:
- The pathway begins with one molecule of glucose (C6H12O6).

3. **Products of Glycolysis**:
- During glycolysis, one molecule of glucose is converted into two molecules of pyruvate.
- This process involves several enzymatic reactions.

4. **ATP Production**:
- In glycolysis, a total of 4 ATP molecules are produced. However, 2 ATP molecules are consumed in the initial steps of the pathway.
- Therefore, the net gain of ATP is:
\[ \text{Net ATP} = \text{Total ATP produced} - \text{ATP consumed} = 4 - 2 = 2 \text{ ATP} \]

5. **NADH Production**:
- Additionally, during glycolysis, 2 molecules of NADH are produced. This occurs when glucose is oxidized, and NAD+ is reduced to NADH.

6. **Final Summary of Products**:
- The net gain from one cycle of the EMP pathway (glycolysis) is:
- **2 ATP**
- **2 NADH + H⁺ (hydrogen ions)**

### Conclusion:
The net gain in the EMP pathway is **2 ATP and 2 NADH + H⁺**.