An antiviral substance known to prevent the synthesis of new virus in the cells is known as

Options

A. Transferon
B. Antibody
C. Colostrum
D. Interferon

Answer

To answer the question, "An antiviral substance known to prevent the synthesis of new virus in the cells is known as," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Antiviral Substances**:
- Antiviral substances are agents that work against viruses. They can prevent the replication or synthesis of new viruses within infected cells.

2. **Identifying Key Antiviral Agents**:
- There are several substances known to have antiviral properties, including interferons, antibodies, and other therapeutic agents.

3. **Focus on Interferons**:
- Among the substances mentioned, interferons are specifically known for their role in preventing the synthesis of new viruses. When a cell is infected by a virus, it produces interferons as a response to alert neighboring cells and enhance their defenses against viral infection.

4. **Conclusion**:
- The antiviral substance that is known to prevent the synthesis of new viruses in the cells is called **Interferons**.

### Final Answer:
**Interferons**

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