m RNA is formed from one strand of DNA. This strand is called

Options

A. Antisense
B. Sense
C. Cistron
D. Recon

Answer

To solve the question "mRNA is formed from one strand of DNA. This strand is called," we need to identify the correct term that describes the DNA strand from which mRNA is synthesized. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Process of Transcription
- Transcription is the process where mRNA is synthesized from a DNA template. During this process, RNA polymerase binds to a specific region on the DNA.

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

### Step 2: Identify the Strands of DNA
- DNA consists of two strands: the sense strand (also known as the coding strand) and the anti-sense strand (also known as the non-coding strand). The sense strand has the same sequence as the mRNA (except for thymine being replaced by uracil).

**Hint:** Think about which strand carries the genetic code that is directly used to make proteins.

### Step 3: Determine the Role of Each Strand
- The sense strand serves as a template for mRNA synthesis. In contrast, the anti-sense strand is complementary to the sense strand and is not used for coding mRNA.

**Hint:** Recall that the sense strand is the one that is read by RNA polymerase to create mRNA.

### Step 4: Analyze the Options Given
- The options provided are:
1. Anti-sense
2. Sense
3. Stront
4. Decon

- Based on our understanding:
- **Anti-sense** is incorrect because it refers to the non-coding strand.
- **Sense** is correct as it refers to the coding strand from which mRNA is formed.
- **Stront** and **Decon** do not relate to any known terms in genetics.

**Hint:** Eliminate the options that do not fit the definitions we discussed.

### Step 5: Conclusion
- The correct answer is **Sense strand**, as this is the strand of DNA from which mRNA is synthesized during transcription.

**Final Answer:** The strand of DNA from which mRNA is formed is called the **Sense strand**.