An antiviral chemical produced by the animal cell is

Options

A. Virion
B. Interferon
C. Repressor protein
D. Hormone

Answer

To solve the question "An antiviral chemical produced by the animal cell is," we will analyze the given options and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for an antiviral chemical that is produced by animal cells. We need to identify which of the given options fits this description.

2. **Evaluate the Options**:
- **Virion**: A virion is an entire virus particle, which consists of a protein shell (capsid) and nucleic acid. It is not a chemical produced by animal cells, but rather a form of the virus itself. Therefore, this option is incorrect.

- **Interferon**: Interferons are proteins produced by animal cells, particularly by white blood cells, in response to viral infections. They play a crucial role in the immune response by interfering with viral replication and boosting the immune system. This option fits the description of an antiviral chemical produced by animal cells, making it a strong candidate for the correct answer.

- **Repressor Protein**: Repressor proteins are involved in gene regulation and inhibit the expression of specific genes. They do not have antiviral properties and are not produced specifically to combat viruses. Thus, this option is incorrect.

- **Hormone**: Hormones are chemical messengers that travel through the bloodstream to regulate various physiological processes. They are not specifically antiviral agents and do not fit the description of an antiviral chemical. Therefore, this option is also incorrect.

3. **Conclusion**: After evaluating all the options, the only correct answer is **Interferon**, as it is specifically produced by animal cells in response to viral infections and has antiviral properties.

### Final Answer:
The antiviral chemical produced by the animal cell is **Interferon**.

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