Question

If the bottom strand of the DNA is the template, the tRNA anticodon sequence, left to right 5′ to 3′, for the first RNA codon is:

a) GCC
b) UGC
c) CAG
d) ACG

Answer 1

To determine the tRNA anticodon for a given DNA template sequence, first transcribe the sequence to mRNA, then determine the tRNA that is complementary and antiparallel to this mRNA codon. In this case, the tRNA anticodon corresponds to option (a) GCC.

Step-by-step explanation:

The subject of the given question is Biology, specifically the transcription and translation processes in molecular genetics. When provided with a DNA template strand sequence, to find the corresponding tRNA anticodon for the first codon, we must apply the rules of base pairing.

Since the tRNA anticodon is antiparallel to the mRNA codon, and the codon would be complementary to the DNA template, we first transcribe the DNA template to mRNA, ensuring to replace thymine (T) with uracil (U) in the RNA. If the DNA template strand is 3'-CGG-5', the mRNA codon transcribed would be 5'-GCC-3'. Therefore, the tRNA anticodon sequence, in the 5' to 3' direction, would be 3'-GGC-5', which is option (a) GCC.