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Features of Codon

If the tRNA a...

Question

If the tRNA anticodon for the amino acid is CAA (reading 3' to 5') then the codon for valine (reading 5' to 3') in mRNA will be

A

TTG

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B

GGU

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C

CCA

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D

CCG

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E

GUU

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Solution

The correct option is A GUU
The mRNA contains the codons and the tRNA have the complementary sequences called as the anticodons. The anticodon on tRNA for valine is CAA and so, the codon on the mRNA sequence will be complementary to CAA as GUU. Since, it is mRNA sequence, T in DNA s replaced by U in RNA.
Thus, the correct answer is option 'GUU'.

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C. tRNA is usually smaller than mRNA.

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(a) At what end of tRNA is this amino acid attached?
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3^{'}

(first nucleotide) to

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DNA template strand:

5^{'} - G C G A C A T A C A C T - 3^{'}

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