Consider the following statements.
I. rRNA provides the template for synthesis of proteins.
II. tRNA brings amino acids and reads the genetic code.
III. RNA polymerase binds to promoter and initiates transcription.
IV. A segment of DNA coding for polypeptide is called intron.

Options

A. I and III are correct
B. I and II are correct
C. I, II and III are correct
D. II and III are correct

Answer

To solve the question, we will analyze each of the four statements provided and determine their correctness based on our understanding of molecular biology, particularly the roles of different types of RNA and the process of transcription.

### Step-by-Step Solution:

1. **Analyze Statement I:**
- **Statement:** rRNA provides the template for synthesis of proteins.
- **Evaluation:** This statement is incorrect. The template for protein synthesis is provided by mRNA (messenger RNA), not rRNA (ribosomal RNA). rRNA is a component of ribosomes, which are the sites of protein synthesis, but it does not serve as a template.

2. **Analyze Statement II:**
- **Statement:** tRNA brings amino acids and reads the genetic code.
- **Evaluation:** This statement is correct. tRNA (transfer RNA) is responsible for bringing the appropriate amino acids to the ribosome during translation and it recognizes the codons on the mRNA through its anticodon, effectively reading the genetic code.

3. **Analyze Statement III:**
- **Statement:** RNA polymerase binds to promoter and initiates transcription.
- **Evaluation:** This statement is also correct. RNA polymerase is the enzyme that binds to the promoter region of a gene and initiates the process of transcription, where DNA is transcribed into RNA.

4. **Analyze Statement IV:**
- **Statement:** A segment of DNA coding for polypeptide is called intron.
- **Evaluation:** This statement is incorrect. A segment of DNA that codes for a polypeptide is called an exon. Introns are non-coding regions that are transcribed into RNA but are spliced out before translation.

### Conclusion:
Based on the evaluations:
- Statement I is incorrect.
- Statement II is correct.
- Statement III is correct.
- Statement IV is incorrect.

Thus, the correct answer is that **Statements II and III are correct.**

### Final Answer:
The correct statements are **II and III.**

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