Question

RNA interference helps in

• A. Cell proliferation
• B. Micropropagation
• C. Cell defence
• D. Cell differentiation

Hint:

RNA interference is an essential biological defense mechanism, helping cells silence unwanted genes and protect against viral infections and genetic instability.

Answer 1

The Correct Option is C

RNA interference (RNAi) is a mechanism used by cells to regulate the expression of genes and to protect themselves from viruses and transposons. RNAi helps cells defend themselves by silencing the expression of specific genes through the degradation of mRNA. This process is particularly important in immune responses, where RNAi can prevent the replication of viruses.

(1) Cell Defence:
- RNAi plays an important role in protecting cells from viral infections by silencing viral genes and transposons that could otherwise disrupt cellular function. It is an essential part of the innate immune system in many organisms.

(2) Why Other Options Are Incorrect:
- Cell proliferation (Option 1) refers to the process of cell division and growth. RNAi is not directly involved in promoting cell proliferation but may influence it indirectly by regulating genes involved in the cell cycle.
- Micropropagation (Option 2) involves the growth of plants from small tissue samples and is not directly related to RNAi.
- Cell differentiation (Option 4) refers to the process by which cells become specialized for particular functions. While RNAi can affect gene expression during differentiation, its primary role is in gene regulation and defense rather than directly in differentiation.

Conclusion: RNA interference primarily helps in cell defence by regulating gene expression and protecting cells from harmful genetic elements like viruses and transposons.