mRNA silencing is called-

Options

A. RNAi
B. RNA activation
C. RNA without initiation codon
D. RNA is not producing interferon

Answer

To answer the question "mRNA silencing is called-", we will break down the information provided in the video transcript step by step.

### Step-by-Step Solution:

1. **Understanding mRNA Silencing**:
- mRNA silencing refers to the process by which the expression of a specific mRNA molecule is inhibited or silenced. This is an important regulatory mechanism in cells.

2. **Identifying the Correct Term**:
- The video mentions that mRNA silencing is referred to as "RNA interference" or "RNAi." This is a well-known biological process where RNA molecules inhibit gene expression or translation.

3. **Explaining RNAi**:
- RNA interference (RNAi) involves the use of small RNA molecules that can bind to mRNA and prevent its translation into proteins. This process is crucial for regulating gene expression and defending against viral infections.

4. **Role of Dicer and RISC**:
- The video explains that double-stranded RNA is processed by an enzyme called Dicer, which then produces small interfering RNA (siRNA).
- These siRNA molecules are incorporated into a complex known as RISC (RNA-induced silencing complex), which targets and degrades complementary mRNA, thus silencing gene expression.

5. **Conclusion**:
- Based on the above points, we can conclude that mRNA silencing is called RNA interference (RNAi).

### Final Answer:
mRNA silencing is called RNA interference (RNAi).

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