Question

3' AAA TGC GCG ATA 5' is the sequence of nucleotides on a gene; after transcription the mRNA formed against it and the sequence of bases in the corresponding binding anticodons will be

• A. 5' UUU ACG CGC UAU 3' and 3' AAA UGC GCG AUA 5'
• B. 5' UAU CGC GCA UUU 3' and 3' AUA GCG CGU AAA 5'
• C. 5' UUU ACC TUG UAU 3' and 3' AAA UGG UAC AUA 5'
• D. 5' UAU GUT CCA UUU 3' and 3' AUA CAU GGU AAA 5'

Answer 1

The correct option is A 5' UUU ACG CGC UAU 3' and 3' AAA UGC GCG AUA 5'

The correct answer is 5' UUU ACG CGC UAU 3' and 3' AAA UGC GCG AUA 5'.

We know that codons and anticodons are complementary. Adenine base pairs with uracil in RNA and thymine in DNA. Guanine and cytosine pair with each other. These are complementary base pairs. Out of these, Adenine and guanine are purines (2 carbon-nitrogen ring) and Thymine and cytosine are pyrimidinesn(1 carbon-nitrogen ring).

So, the correct answer is "Option A".