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Question
The regions expressed as polypeptides on mRNA are
The regions expressed as polypeptides on mRNA are
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Solution
The correct option is D Exons
Exon is the nucleotide sequence of mRNA that carries information for the synthesis of a protein while the interrupting sequences that do not code for any protein but are present between exons in mRNA, are called as introns. The nucleotide sequence of exon determines the sequence and type of amino acids of a polypeptide. Cistron is defined as DNA segment that carries the genetic code for a single polypeptide and therefore functions as a hereditary unit, i.e., cistrons are transcribed as a unit into a single polynucleotide sequence of mRNA. So, the correct answer is option B.
Exon is the nucleotide sequence of mRNA that carries information for the synthesis of a protein while the interrupting sequences that do not code for any protein but are present between exons in mRNA, are called as introns. The nucleotide sequence of exon determines the sequence and type of amino acids of a polypeptide. Cistron is defined as DNA segment that carries the genetic code for a single polypeptide and therefore functions as a hereditary unit, i.e., cistrons are transcribed as a unit into a single polynucleotide sequence of mRNA.
So, the correct answer is option B.
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