Question

question 4 of 10
which strand of mrna would be made during transcription using the dna
strand shown below?
gtt acc
a. caa ugg
b. ctt agg
c. ctt acc
d. cuu agg

Explanation:

Step1: Recall base - pairing rules

In transcription, DNA bases pair with RNA bases. DNA has A (adenine), T (thymine), G (guanine), C (cytosine). RNA has A, U (uracil), G, C. The base - pairing rules are A - U and T - A (since RNA has U instead of T), G - C and C - G.

Step2: Apply base - pairing to each DNA base

For the DNA strand GTT ACC:

• G (in DNA) pairs with C (in mRNA)
• T (in DNA) pairs with A (in mRNA)
• T (in DNA) pairs with A (in mRNA)
• A (in DNA) pairs with U (in mRNA)
• C (in DNA) pairs with G (in mRNA)
• C (in DNA) pairs with G (in mRNA)

So, GTT ACC (DNA) gives CAA UGG (mRNA).

Answer:

A. CAA UGG