which of the following is a contractile protein ?

Options

A. P-protein
B. Myosin
C. Albumin
D. Penneases

Answer

To determine which of the following is a contractile protein, we will analyze each option provided:

1. **P Protein**:
- P protein is primarily found in the phloem tissue of plants.
- Its main function is related to the transport of nutrients and does not involve muscle contraction.
- Therefore, P protein is **not** a contractile protein.

2. **Myosin**:
- Myosin is well-known as a contractile protein.
- It plays a crucial role in muscle contraction by interacting with another protein called actin.
- Myosin facilitates the contraction and relaxation of muscle fibers.
- Thus, myosin is a contractile protein.

3. **Albumin**:
- Albumin is a type of protein that primarily functions in maintaining osmotic pressure in the blood.
- It does not have any role in muscle contraction.
- Therefore, albumin is **not** a contractile protein.

4. **Peniesis**:
- There seems to be a typographical error here, as "peniesis" is not a recognized term in the context of proteins.
- Assuming it refers to a non-specific protein, it would not be classified as a contractile protein.

Based on the analysis of each option, the correct answer is **myosin**, as it is the only protein listed that is known to be involved in muscle contraction.

### Final Answer:
The contractile protein among the options is **myosin**.