If the sequence of bases in coding strand of DNA is ATTCGATG, then the sequence of bases in mRNA will be

Options

A. TAAGCTAC
B. UAAGCUAC
C. ATTCGATG
D. AUUCGAUG

Answer

To determine the sequence of bases in mRNA from the given coding strand of DNA (ATTCGATG), we need to follow these steps:

### Step-by-Step Solution:

1. **Identify the DNA Coding Strand**: The coding strand of DNA is given as ATTCGATG.

2. **Understand Base Pairing Rules**:
- In DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G).
- In RNA, adenine (A) pairs with uracil (U) instead of thymine (T).

3. **Transcribe the DNA Sequence to mRNA**:
- Replace each base in the DNA coding strand with its complementary RNA base:
- A (Adenine) in DNA pairs with U (Uracil) in RNA.
- T (Thymine) in DNA pairs with A (Adenine) in RNA.
- C (Cytosine) in DNA pairs with G (Guanine) in RNA.
- G (Guanine) in DNA pairs with C (Cytosine) in RNA.

4. **Apply the Transcription Rules**:
- A → U
- T → A
- T → A
- C → G
- G → C
- A → U
- T → A
- G → C

5. **Write the mRNA Sequence**:
- Following the above substitutions, the mRNA sequence corresponding to the DNA coding strand ATTCGATG will be:
- UAAUGCUAC

### Final Answer:
The sequence of bases in mRNA will be **UAACGCUAC**.