THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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112
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336
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672
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1008
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Detailed explanation-1: -The mRNA is 336 nucleotides long, includes initiator and terminator codon. The number of amino acids in the polypeptide translated from this mRNA is 111.
Detailed explanation-2: -Hence, it can be concluded that a 300-nucleotide-long mRNA strand will give rise to 100 amino acids, generating a polypeptide chain.
Detailed explanation-3: -These three-letter words are called codons. Each codon stands for a specific amino acid, so if the message in mRNA is 900 nucleotides long, which corresponds to 300 codons, it will be translated into a chain of 300 amino acids.
Detailed explanation-4: -The start codon often also codes for the amino acid methionme which may or may not end up being a part of the final protein. However the stop codon would not code for an amino acid. Thus with 66 codons in the mRNA there could be as many as 65 amino acids in the protein product. A functional piece of mRNA has 66 codons.