BIOLOGY
STRUCTURE OF PROTEINS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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One
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Two
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Three
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Four
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Detailed explanation-1: -One amino acid codes triplet three nucleotide. So, after addition of adenosine residue the total number of nucleotide is 16. So five amino acids will be coded by the mRNA sequence.
Detailed explanation-2: -Eight amino acids have two codons, whereas there is one codon each for methionine and tryptophan. A second important fact about the genetic code is that there are three possible reading frames for any particular nucleotide sequence (Fig.
Detailed explanation-3: -The three-letter nature of codons means that the four nucleotides found in mRNA-A, U, G, and C-can produce a total of 64 different combinations. Of these 64 codons, 61 represent amino acids, and the remaining three represent stop signals, which trigger the end of protein synthesis.
Detailed explanation-4: -Methionine and tryptophan are the only two amino acids that are coded for by just a single codon (AUG and UGG, respectively).