Which of the following RNAs should be most abundant in animal cell

Options

A. r-RNA
B. t-RNA
C. m-RNA
D. mi-RNA

Answer

To determine which type of RNA is most abundant in animal cells, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of RNA**:
- There are several types of RNA present in animal cells, including:
- Ribosomal RNA (rRNA)
- Transfer RNA (tRNA)
- Messenger RNA (mRNA)
- Mitochondrial RNA (miRNA)

2. **Identify the Function of Each RNA Type**:
- **rRNA**: Forms the core of ribosome structure and is essential for protein synthesis.
- **tRNA**: Transfers amino acids to the ribosome during protein synthesis.
- **mRNA**: Carries genetic information from DNA to the ribosome for protein synthesis.
- **miRNA**: Involved in regulating gene expression.

3. **Determine the Abundance of Each RNA Type**:
- Among these types, rRNA is known to be the most abundant. It constitutes a significant portion of the total RNA found in cells.
- In fact, rRNA makes up about 80% of the total RNA content in animal cells.

4. **Conclude the Most Abundant RNA**:
- Based on the information regarding the abundance and function of each RNA type, we can conclude that ribosomal RNA (rRNA) is the most abundant RNA in animal cells.

### Final Answer:
The most abundant RNA in animal cells is **rRNA (ribosomal RNA)**.

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