At resting stage charge of inner surface is due to presence of

Answer

### Step-by-Step Solution:

1. **Understanding Resting Potential**: The resting stage of a neuron is characterized by a specific distribution of ions across its membrane, which creates a difference in charge between the inside and outside of the cell.

2. **Ion Distribution**: At rest, the inside of the neuron has a higher concentration of potassium ions (K⁺) compared to the outside. This is crucial for maintaining the resting membrane potential.

3. **Role of Potassium Ions (K⁺)**: The presence of these potassium ions contributes to the positive charge on the inner surface of the neuron. This is because K⁺ ions are positively charged, and their higher concentration inside the neuron compared to the outside leads to a net positive charge.

4. **Negatively Charged Proteins**: In addition to potassium ions, there are also negatively charged proteins present inside the neuron. These proteins do not move across the membrane and contribute to the overall negative charge inside the neuron.

5. **Net Charge at Resting Stage**: The combination of the high concentration of K⁺ ions and the presence of negatively charged proteins results in the inner surface of the neuron being positively charged relative to the outside, which is essential for the generation of action potentials when the neuron is activated.

### Final Answer:
At the resting stage, the charge of the inner surface of a neuron is primarily due to the presence of potassium ions (K⁺) and negatively charged protein molecules.

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