Question

if a strand of dna has the sequence cgtaa, the mrna made from this molecule will have the sequence
o tagcc.
o gcauu.
o gcutt.
o cgtaa.

Explanation:

Step1: Recall base - pairing rules

In transcription, DNA base pairs with mRNA. The rules are \(A - U\), \(T - A\), \(C - G\), \(G - C\).

Step2: Apply rules to DNA sequence \(CGTAA\)

• \(C\) pairs with \(G\)
• \(G\) pairs with \(C\)
• \(T\) pairs with \(A\)
• \(A\) pairs with \(U\)
• \(A\) pairs with \(U\)

So, \(CGTAA\) (DNA) gives \(GCAUU\) (mRNA)

Answer:

GCAUU.