RNA is synthesized on

Options

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

Answer

To answer the question "RNA is synthesized on," we need to understand the process of transcription, which is the synthesis of RNA from a DNA template.

### Step-by-Step Solution:

1. **Understanding RNA Synthesis**: RNA synthesis occurs through a process called transcription, where RNA polymerase is the key enzyme involved.

**Hint**: Remember that transcription is the first step in gene expression where RNA is made from DNA.

2. **Role of RNA Polymerase**: RNA polymerase adds ribonucleotides to form RNA. It uses one of the DNA strands as a template to determine the sequence of the RNA.

**Hint**: Think of RNA polymerase as a builder that constructs RNA using the blueprint provided by DNA.

3. **Template Strand Identification**: In DNA, there are two strands: the sense (coding) strand and the antisense (template) strand. The antisense strand is the one that serves as the template for RNA synthesis.

**Hint**: The antisense strand is complementary to the RNA being synthesized, while the sense strand has the same sequence as the RNA (except for thymine being replaced by uracil).

4. **Conclusion on RNA Synthesis**: RNA is synthesized specifically on the antisense strand of DNA. The sense strand is not used for RNA synthesis.

**Hint**: Focus on the term "antisense" as it indicates the strand that is complementary and used for transcription.

### Final Answer:
RNA is synthesized on the antisense strand of DNA.