Term " virion " is used for

Options

A. mycoplasma colony
B. single virus
C. group of viruses
D. cancerous cells

Answer

To answer the question "Term 'virion' is used for," we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding the Term 'Virion':**
- The term 'virion' refers to a complete virus particle that is capable of infecting a host cell. It is the infectious form of the virus.

2. **Components of a Virion:**
- A virion consists of two main components:
- **Capsid:** This is the outer protein shell that protects the viral genetic material.
- **Nucleic Acid:** Inside the capsid, the virion contains nucleic acid, which can be either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid).

3. **Analyzing the Options:**
- **Option 1: Mycoplasma** - Mycoplasma are bacteria that lack a cell wall; this option is incorrect.
- **Option 2: Single Virus** - This option correctly describes a virion as it refers to a complete virus particle.
- **Option 3: Group of Viruses** - This option is incorrect because a virion refers to a single virus, not a group.
- **Option 4: Cancerous Cells** - This option is also incorrect as cancerous cells are not related to the definition of a virion.

4. **Conclusion:**
- Based on the analysis, the correct answer is **Option 2: Single Virus**, as it accurately describes what a virion is.

### Final Answer:
The term "virion" is used for **a single virus**.