The sequence of bases on part of a molecule of DNA is shown.
TACAAATGCCA Sense strand ATGTTTACTGGT Antisense strand What is the sequence of bases in mRNA transcribed from this sequence ?

Options

A. ATGTTTACTGGT
B. AUGUUUACUGGU
C. TACAAATGACCA
D. UACAAAUGACCA

Answer

To determine the sequence of bases in the mRNA transcribed from the given DNA sequence, we need to follow these steps:

### Step 1: Identify the Antisense Strand
The antisense strand of DNA is the template strand used for transcription. In this case, the antisense strand is given as:
- Antisense strand: ATGTTTACTGGT

### Step 2: Transcribe the Antisense Strand to mRNA
During transcription, RNA polymerase reads the antisense strand of DNA and synthesizes a complementary strand of mRNA. The base pairing rules are as follows:
- Adenine (A) pairs with Uracil (U) in RNA
- Thymine (T) pairs with Adenine (A)
- Cytosine (C) pairs with Guanine (G)
- Guanine (G) pairs with Cytosine (C)

Using these rules, we will transcribe the antisense strand to mRNA.

### Step 3: Write the mRNA Sequence
Now, let's transcribe the antisense strand (ATGTTTACTGGT) to mRNA:
- A (from DNA) → U (in mRNA)
- T (from DNA) → A (in mRNA)
- G (from DNA) → C (in mRNA)
- T (from DNA) → A (in mRNA)
- T (from DNA) → A (in mRNA)
- A (from DNA) → U (in mRNA)
- C (from DNA) → G (in mRNA)
- T (from DNA) → A (in mRNA)
- G (from DNA) → C (in mRNA)
- G (from DNA) → C (in mRNA)
- T (from DNA) → A (in mRNA)

Putting it all together, the mRNA sequence transcribed from the antisense strand is:
- mRNA: UACAAAUUGCCU

### Step 4: Final Answer
The sequence of bases in mRNA transcribed from the given DNA sequence is:
- **UACAAAUUGCCU**