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Cistron is the DNA segment that codes for a specific polypeptide in protein synthesis .

Exons are the segments of DNA and RNA that contain information coding for a protein or peptide sequence. Cistron is the DNA segment that codes for a specific polypeptide in  protein synthesis . Let us have a detailed overview of the difference between exon and cistron. Also Read:  Central Dogma

Following are the important difference between exon and cistron:

Exon is a segment of DNA that contains information coding for a protein. That can either be together or separated by introns. These introns are non-coding sequences that are removed to make a functional mRNA molecule. This functional mRNA molecule is then translated into protein.

Cistron is the alternative term for gene. It is the DNA segment that codes for a polypeptide during protein synthesis. A DNA segment with one cistron is called monocistronic, whereas, a DNA segment with more than one cistron is called polycistronic. Also Read:  Transcription

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These are the coding regions of DNA, i.e., an exon has several cistrons.

It is the DNA segment that directs the synthesis of a peptide sequence.

These appear in mature or processed RNA.

It is an alternative term for gene.

It was discovered by Richard Roberts.

Cistron was discovered by Seymour Benzer.