Question

check all ways below to ensure that the bases in rna are properly paired. the template dna would be 3 gucuacaugccugcuauu 5. the mrna strand is complementary to the dna template strand. during transcription, g in dna pairs with c in mrna, and a in dna pairs with u in mrna.

Explanation:

• For the first option: DNA bases are A, T, C, G. The given template has U which is incorrect (U is in RNA). So this option is wrong.
• For the second option: mRNA is synthesized based on complementary base - pairing with the DNA template strand. So this is a correct way.
• For the third option: During transcription, base - pairing rules are G - C (DNA - mRNA) and A - U (DNA - mRNA). So this is a correct way.

Answer:

B. The mRNA strand is complementary to the DNA template strand.
C. During transcription, G in DNA pairs with C in mRNA, and A in DNA pairs with U in mRNA.