OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The antisense strand on the DNA molecule coding for three codons of a gene is:TATCGCACGWhat are the anticodons of the three tRNA molecules that correspond to this sequence?
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UAU, CGC and ACG
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ATA, GCG and TGC
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AUA, GCG and UGC
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TAT, CGC and ACG
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Explanation:
Detailed explanation-1: -Antisense RNA sequences are complementary to a target mRNA. Antisense RNA forms double-stranded regions that block either protein translation or splicing of introns.
Detailed explanation-2: –According to Chargaff’s base-pairing rules and antiparallel alignment of anticodon and codon, we can say that the tRNA anticodon 3’-UAC-5’ will pair with the mRNA codon 5’-AUG-3’. This codon AUG is the initiation codon and it codes for formyl-Methionine. Thus, the correct answer is C i.e., 5’-AUG-3’.
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