The presence of light and dark band is a feature of

Options

A. Cardiac muscle
B. Skeletal muscle
C. Smooth muscle
D. Both (1) & (2)

Answer

To solve the question regarding the presence of light and dark bands, we will analyze the characteristics of different types of muscle tissues.

### Step-by-Step Solution:

1. **Identify the Types of Muscle Tissue**:
- The question provides four options: cardiac muscle, skeletal muscle, smooth muscle, and both cardiac and skeletal muscle.

2. **Understand the Structure of Muscle Tissues**:
- **Skeletal Muscle**: This type of muscle is striated, meaning it has a banded appearance due to the arrangement of actin and myosin proteins. The light bands are known as I-bands (isotropic) and the dark bands are called A-bands (anisotropic).
- **Cardiac Muscle**: Similar to skeletal muscle, cardiac muscle is also striated and has the same arrangement of actin and myosin, resulting in light and dark bands.
- **Smooth Muscle**: This type of muscle does not have a striated appearance. It lacks the distinct light and dark bands because the actin and myosin are arranged differently.

3. **Analyze the Options**:
- **Option 1 (Cardiac Muscle)**: This is striated and has light and dark bands.
- **Option 2 (Skeletal Muscle)**: This is also striated and has light and dark bands.
- **Option 3 (Smooth Muscle)**: This is not striated and does not have light and dark bands.
- **Option 4 (Both 1 and 2)**: This option includes both cardiac and skeletal muscle, both of which have the presence of light and dark bands.

4. **Conclusion**:
- The presence of light and dark bands is a feature of both cardiac and skeletal muscle. Therefore, the correct answer is **Option 4 (Both 1 and 2)**.

### Final Answer:
The presence of light and dark bands is a feature of both cardiac muscle and skeletal muscle.

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