In eukaryotes, the RNA polymerase that synthesises tRNA is RNA polymerase________ and is also responsible for formatiom of_________rRNA.

Options

A. II, 5.8, S
B. I,5S
C. III,5S
D. II, 18S

Answer

To answer the question step by step, we can break it down as follows:

### Step 1: Identify the RNA Polymerases in Eukaryotes
In eukaryotic cells, there are three main types of RNA polymerases:
- **RNA Polymerase I**
- **RNA Polymerase II**
- **RNA Polymerase III**

### Step 2: Determine the Function of Each RNA Polymerase
- **RNA Polymerase I**: Responsible for synthesizing pre-rRNA, which is a precursor for ribosomal RNA (rRNA) components (18S, 5.8S, and 28S rRNA).
- **RNA Polymerase II**: Responsible for synthesizing messenger RNA (mRNA).
- **RNA Polymerase III**: Responsible for synthesizing transfer RNA (tRNA), 5S rRNA, and small nuclear RNA (snRNA).

### Step 3: Identify the RNA Polymerase for tRNA Synthesis
From the information gathered, we can conclude that:
- **tRNA is synthesized by RNA Polymerase III.**

### Step 4: Identify the rRNA Synthesized by RNA Polymerase III
Additionally, RNA Polymerase III is also responsible for the synthesis of:
- **5S rRNA.**

### Final Answer
Thus, the complete answer to the question is:
In eukaryotes, the RNA polymerase that synthesizes tRNA is RNA polymerase **III** and is also responsible for the formation of **5S rRNA**.

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