Movement of ten electron from mitochondrial NADH molecules produces water molecules

Options

A. 20
B. 15-
C. 10
D. 5

Answer

To solve the question about how many water molecules are produced from the movement of 10 electrons from mitochondrial NADH molecules, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Role of NADH**: NADH is an electron carrier that plays a crucial role in cellular respiration, particularly in the electron transport chain (ETC) located in the inner mitochondrial membrane.

2. **Electron Transport Chain (ETC)**: In the ETC, electrons from NADH and FADH2 are transferred through a series of proteins and complexes. This process ultimately leads to the reduction of molecular oxygen (O2) to water (H2O).

3. **Reduction of Oxygen**: Each molecule of oxygen requires 2 electrons to be reduced to form 1 molecule of water. This means that for every 2 electrons, 1 water molecule is produced.

4. **Calculating Water Production**: If we have 10 electrons from NADH:
- Since 1 water molecule is formed from 2 electrons, we can calculate the number of water molecules produced from 10 electrons as follows:
\[ \text{Number of water molecules} = \frac{\text{Number of electrons}}{2} = \frac{10}{2} = 5 \]

5. **Conclusion**: Therefore, the movement of 10 electrons from mitochondrial NADH molecules produces 5 water molecules.

### Final Answer:
The correct option is **5 water molecules**.

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