Which of the following is synthesized by RNA Polymerase III ?

Options

A. tRNA only
B. sn RNA only
C. 5s rRNA only
D. tRNA , 5S rRNA and sn RNA.

Answer

To solve the question "Which of the following is synthesized by RNA Polymerase III?", we will follow these steps:

### Step 1: Understand the Role of RNA Polymerases
In eukaryotic cells, there are three main types of RNA polymerases, each responsible for synthesizing different types of RNA:
- **RNA Polymerase I**: Synthesizes ribosomal RNA (rRNA) except for 5S rRNA.
- **RNA Polymerase II**: Synthesizes messenger RNA (mRNA) and some small nuclear RNAs (snRNA).
- **RNA Polymerase III**: Synthesizes transfer RNA (tRNA), 5S rRNA, and some small nuclear RNAs (snRNA).

### Step 2: Identify the Types of RNA Synthesized by RNA Polymerase III
From our understanding of RNA Polymerase III, we can identify the specific types of RNA it synthesizes:
- **tRNA (transfer RNA)**
- **5S rRNA (a component of the ribosome)**
- **snRNA (small nuclear RNA)**

### Step 3: Evaluate the Options Given
The question provides multiple options. We need to determine which of these options includes the types of RNA synthesized by RNA Polymerase III:
1. tRNA only
2. snRNA only
3. 5S rRNA
4. tRNA, 5S rRNA, and snRNA

### Step 4: Select the Correct Option
Since RNA Polymerase III synthesizes tRNA, 5S rRNA, and snRNA, the correct option is:
- **Option 4: tRNA, 5S rRNA, and snRNA**

### Final Answer
The correct answer is **Option 4: tRNA, 5S rRNA, and snRNA**.

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