Question

One codon for phenylalanine has the sequence UUC. What is the sequence of the anticodon on...

One codon for phenylalanine has the sequence UUC. What is the sequence of the anticodon on the aminoacyl-tRNA (in the 5′ to 3′ direction)?

a,GAA

b,GGA

c,TTG

d,,AAG

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Answer #1

DNA has two strands- coding strand (5' to 3') and template starnd (3' to 5'). During the process of transcription which is converting from DNA to mRNA, RNA polymerase uses the template strand of DNA to make the mRNA in 5' to 3' direction. The mRNA produced is complementary to the template strand but same as the coding strand of DNA except the T is replaced by U.

The 5' to 3' mRNA serves as the template for the peptide synthesis.

Phenylalanine has codon- UUC

The anticodon sequence on the aminoacyl tRNA is AAG (in 3' to 5' direction)

Thus the anticodon in 5' to 3' direction is-

GAA

The correct answer is-

a) GAA

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