Heavy and light meromyosin are components of

Options

A. Actin filament
B. Myosin filament
C. Troponin protein
D. Tropomyosin protein

Answer

To solve the question "Heavy and light meromyosin are components of," we will analyze the options provided and determine the correct answer step by step.

### Step 1: Understanding the Components
Heavy and light meromyosin are specific terms used in muscle biology. They refer to parts of a larger structure known as myosin.

**Hint:** Think about the structure of myosin and its role in muscle contraction.

### Step 2: Identifying Myosin
Myosin is a motor protein that plays a crucial role in muscle contraction. It is made up of different parts, including heavy meromyosin and light meromyosin.

**Hint:** Recall that myosin interacts with actin filaments during muscle contraction.

### Step 3: Differentiating Between Options
Now, let's look at the options provided:
1. Actin filament
2. Myosin filament
3. Troponin protein
4. Tropomyosin protein

From our understanding, heavy and light meromyosin are not part of actin filaments, troponin, or tropomyosin. They are specifically components of myosin filaments.

**Hint:** Eliminate options that are not related to myosin.

### Step 4: Conclusion
Based on the analysis, we can conclude that heavy and light meromyosin are components of the myosin filament.

**Final Answer:** Heavy and light meromyosin are components of **myosin filament** (Option 2).