Biomembrance are

Options

A. asymmetric and solid sheet like
B. symmetric and globular
C. asymmetric and fludiy
D. symmetric and fluidy

Answer

### Step-by-Step Solution:

1. **Understanding Biomembranes**: Biomembranes, also known as biological membranes, are structures that separate the interior of cells from the external environment. They are primarily composed of a phospholipid bilayer with embedded proteins.

2. **Key Characteristics**: One of the essential characteristics of biomembranes is that they are **asymmetric**. This means that the composition of the two layers of the membrane is not the same; different types of lipids and proteins are distributed unevenly between the inner and outer layers.

3. **Fluidity of Biomembranes**: Biomembranes exhibit **fluidity**, which allows for the movement of proteins and lipids within the layer. This fluid nature is crucial for various cellular processes, including signaling and transport.

4. **Transport Mechanisms**: Molecules and ions can pass through the biomembrane using specific transmembrane transport proteins. This selective permeability is a vital function of biomembranes, allowing cells to maintain homeostasis.

5. **Conclusion**: Given the characteristics of biomembranes, they are best described as **asymmetric and fluid**. Therefore, the correct answer to the question is **option C: asymmetric and fluidity**.