By using only one of the two strands of DNA, nRNA is produced The process called as _______

Options

A. transcription
B. translation
C. translocation
D. replacement

Explanation

To solve the question, we need to identify the process by which mRNA is produced using only one strand of DNA. Here’s a step-by-step explanation:

### Step-by-Step Solution:

1. **Understanding DNA Structure**: DNA consists of two strands that form a double helix. Each strand has a specific sequence of nucleotides.

2. **Identifying the Template Strand**: In the process of mRNA synthesis, one of these two strands of DNA serves as a template. This is crucial because only one strand is used to create the complementary RNA strand.

3. **Defining the Process**: The process of synthesizing mRNA from the DNA template is known as transcription. During transcription, the enzyme RNA polymerase binds to the DNA and synthesizes a single strand of RNA by matching RNA nucleotides with the complementary DNA nucleotides.

4. **Clarifying Other Processes**:
- **Translation** is the process where the mRNA is used to synthesize proteins.
- **Replication** refers to the process of copying DNA to produce two identical DNA molecules.
- **Translocation** is a term often used in the context of translation and refers to the movement of the ribosome along the mRNA.

5. **Conclusion**: Since the question specifically asks for the process of producing mRNA from one strand of DNA, the correct answer is transcription.

### Final Answer:
The process called as **transcription**.