Identify the sequence of mRNA from the given sequence of coding strand of DNA.
5' T A C G T A G 3'

Options

A. 5' U T G C U T C 3'
B. 3' U A C G U A G 5'
C. 3' U G C U T C 5'
D. 5' U A C G U A G 3'

Answer

To identify the sequence of mRNA from the given coding strand of DNA, follow these steps:

### Step 1: Understand the DNA Coding Strand
The given DNA coding strand is:
5' T A C G T A G 3'

### Step 2: Transcribe the DNA Coding Strand to mRNA
During transcription, the mRNA is synthesized from the DNA template strand. The mRNA sequence is complementary to the DNA template strand and is synthesized in the 5' to 3' direction.

- In DNA, adenine (A) pairs with uracil (U) in RNA, thymine (T) pairs with adenine (A), cytosine (C) pairs with guanine (G), and guanine (G) pairs with cytosine (C).

### Step 3: Write the Complementary mRNA Sequence
Now, we will replace each base in the coding strand with its complementary RNA base:
- T (thymine) in DNA pairs with A (adenine) in RNA
- A (adenine) in DNA pairs with U (uracil) in RNA
- C (cytosine) in DNA pairs with G (guanine) in RNA
- G (guanine) in DNA pairs with C (cytosine) in RNA

Thus, the transcription from the coding strand will be:
- T → A
- A → U
- C → G
- G → C
- T → A
- A → U
- G → C

Putting it all together, the mRNA sequence will be:
5' U A C G U A G 3'

### Step 4: Final Answer
The sequence of mRNA from the given coding strand of DNA is:
5' U A C G U A G 3'

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