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The immunological protein particles whic...

The immunological protein particles which restrict viral reinfection by not joining viral mRNA to ribosome of host cells, once animals have been infected by virus, is

A

aflatoxin

B

antibody

C

interferon

D

intron

Text Solution

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The correct Answer is:
To solve the question regarding the immunological protein particles that restrict viral reinfection, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Question**: The question is asking for a specific type of immunological protein that prevents viral reinfection by inhibiting the joining of viral mRNA to the ribosomes of host cells after an animal has been infected by a virus. 2. **Analyze the Options**: The options provided are: - Aflatoxin - Antibody - Interferons - Introns 3. **Evaluate Each Option**: - **Aflatoxin**: This is a type of toxin produced by certain molds and is known to be carcinogenic. It does not play a role in viral infections or immune response. - **Antibody**: Antibodies are proteins produced by the immune system to neutralize pathogens, but they do not specifically prevent viral mRNA from joining ribosomes. - **Interferons**: These are proteins produced by virus-infected cells that help protect neighboring cells from viral infection. They work by inhibiting the translation of viral mRNA into proteins, thereby preventing the virus from replicating. - **Introns**: These are non-coding sequences in RNA that are removed during RNA processing. They do not have a role in the immune response to viral infections. 4. **Identify the Correct Answer**: Based on the analysis, interferons are the correct answer because they are specifically known for their role in inhibiting viral replication by preventing viral mRNA from being translated into proteins in host cells. 5. **Conclusion**: The immunological protein particles that restrict viral reinfection by not allowing viral mRNA to join the ribosome of host cells are **interferons**. ### Final Answer: The correct answer is **interferons**.
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