Question

below is the sequence of part of an mrna molecule that is being read by a ribosome: 5' ccg-acg 3' (mrna) what is the anticodon loop of the firsttrna that will complement this segment of mrna? question 8 options: 3' ggc 5' 3' ugc 5' 5' ugc 3' 5' ggc 3' 5' acg 3'

Answer 1

The anticodon loop for the first tRNA that complements the mRNA segment 5' CCG-ACG 3' is 3' GGC 5', which is antiparallel and complementary to the mRNA codon.

Step-by-step explanation:

The anticodon loop of the first tRNA that will complement the mRNA segment 5' CCG-ACG 3' should be complementary and antiparallel to the mRNA. Since the mRNA sequence is read from 5' to 3', the tRNA anticodon will align in the 3' to 5' direction. Consequently, the correct anticodon for the mRNA codon CCG would be 3' GGC 5'. Codons are read from the 5' to 3' direction, and the anticodon on the tRNA is antiparallel to this, therefore the first base in the codon pairs with the third base in the anticodon. Similarly, for the ACG codon in the mRNA sequence, the tRNA with the complementary anticodon sequence would be 3' UGC 5', with the uracil (U) in RNA pairing with adenine (A) in the mRNA. The correct anticodon loop of the first tRNA is 3' GGC 5'.