THE MOLECULAR BASIS OF INHERITANCE
STRUCTURE OF NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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DNA
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mRNA
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tRNA
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rRNA
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Detailed explanation-1: -Which nucleic acid could contain the triplet of bases ACT? RNA (no matter what the type) doesn’t contain the base T (thymine). Only DNA contains this base.
Detailed explanation-2: -The triplets of nitrogenous bases in DNA that code for amino acids is called codons. There are 64 codons, 61 of which code for different amino acids. The remaining three codons are stop/termination codons, which act as stop signals for protein synthesis.
Detailed explanation-3: -For example, when A and C were mixed with polynucleotide phosphorylase, the resulting RNA molecules contained eight different triplet codons: AAA, AAC, ACC, ACA, CAA, CCA, CAC, and CCC.
Detailed explanation-4: -A codon is a triplet of bases (or nucleotides) in the DNA coding for one amino acid.