RNA is synthesized on

Options

A. both strands of DNA
B. on sense strand of DNA
C. on anti sense strand of DNA
D. on cDNA

Answer

To answer the question "RNA is synthesized on," we will analyze the options provided and explain the process of RNA synthesis.

### Step-by-Step Solution:

1. **Understanding DNA Strands**: DNA consists of two strands known as the sense strand and the anti-sense strand. The sense strand has the same sequence as the RNA (except that RNA has uracil instead of thymine), while the anti-sense strand is complementary to the RNA.

2. **Role of the Anti-Sense Strand**: During the process of transcription (the synthesis of RNA), RNA polymerase binds to the anti-sense strand of DNA. This strand serves as a template for the synthesis of RNA.

3. **Transcription Process**:
- RNA polymerase unwinds the DNA double helix.
- It reads the anti-sense strand and synthesizes a complementary RNA strand.
- The RNA strand is synthesized in the 5' to 3' direction, meaning that nucleotides are added to the growing RNA molecule at the 3' end.

4. **Conclusion**: Therefore, RNA is synthesized on the anti-sense strand of DNA, which acts as a template for the formation of the RNA molecule.

### Final Answer:
RNA is synthesized on the anti-sense strand of DNA.

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