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Q.

RNA moleculeAnti-codon pairing
IUCA
IIAUG
IIIAUU
IVAUC

Which of the following tRNA molecules does not exist?

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a

I and II

b

III and IV

c

IV and I

d

II and III

answer is C.

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Detailed Solution

Option (c) is correct as UAA, UAG and UGA are stop codons on mRNA for which no tRNA molecules are present. tRNA molecules have anticodon, therefore anticodons for the mentioned stop codons will be AUU, AUC and ACU which does not exist.

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RNA moleculeAnti-codon pairingIUCAIIAUGIIIAUUIVAUCWhich of the following tRNA molecules does not exist?