Heavy (HMM) and light (LMM) meromyosin chain are found in

Options

A. Adipose tissue
B. Myosin filament
C. Collagen protein
D. Histone protein

Answer

To solve the question regarding where heavy (HMM) and light (LMM) meromyosin chains are found, we can follow these steps:

### Step 1: Understand the components
- **Meromyosin** is a part of the myosin protein, which is essential for muscle contraction.
- Myosin is made up of two main parts: heavy meromyosin (HMM) and light meromyosin (LMM).

**Hint:** Remember that meromyosin is a component of myosin, which is crucial for muscle function.

### Step 2: Identify the role of myosin in muscles
- Myosin, along with actin, forms the contractile units of muscle fibers. These units are known as sarcomeres.
- The interaction between actin and myosin is what allows muscles to contract.

**Hint:** Think about how muscle contraction occurs and the role of myosin in this process.

### Step 3: Locate the presence of meromyosin
- Heavy meromyosin (HMM) is responsible for the head region of the myosin molecule, which binds to actin and ATP.
- Light meromyosin (LMM) forms the tail region of the myosin molecule.

**Hint:** Visualize the structure of myosin to understand where HMM and LMM are located.

### Step 4: Conclude the answer
- Since both heavy and light meromyosin chains are components of myosin, they are found in **myosin filaments** within muscle fibers.

**Hint:** Recall that myosin filaments are part of the muscle structure, specifically in the sarcomere.

### Final Answer:
Heavy (HMM) and light (LMM) meromyosin chains are found in **myosin filaments** in muscle fibers.