Below is a picture of a section of DNA undergoing transcription. The question marks represent the sequence of mRNA that will be transcribed from the DNA. What will the sequence of mRNA be?

Question

(1 point)
Responses

TAC TAG AGC ATT

AUG AUC UCG UAA

ATG ATC TCG TAA

UAC UAG UGC AUU

Answer 1

To determine the sequence of mRNA that will be transcribed from a given DNA sequence, you need to remember the base pairing rules. In transcription, the DNA template strand is used to synthesize mRNA, following these rules:

• Adenine (A) pairs with Uracil (U) in RNA (instead of Thymine in DNA).
• Thymine (T) pairs with Adenine (A).
• Cytosine (C) pairs with Guanine (G), and vice versa.

Assuming the DNA sequence given is "TAC TAG AGC ATT", we will convert this to mRNA:

• T (DNA) → A (mRNA)
• A (DNA) → U (mRNA)
• C (DNA) → G (mRNA)
• T (DNA) → A (mRNA)
• A (DNA) → U (mRNA)
• G (DNA) → C (mRNA)
• A (DNA) → U (mRNA)
• G (DNA) → C (mRNA)
• C (DNA) → G (mRNA)
• A (DNA) → U (mRNA)
• T (DNA) → A (mRNA)
• T (DNA) → A (mRNA)

So, the transcribed mRNA sequence would be:

AUG AUC UCG UAA

Therefore, the correct response is:

AUG AUC UCG UAA