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What is a cistron? Why is the structural gene in a transcription unit of eukaryotes called monocistronic and that in prokaryotes/bacteria called polycistronic? Give reasons. |
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Answer» Cistron is a segment of DNA coding for a polypeptide. In eukaryotes the transcriptional unit have interrupted coding sequences - exons and introns. It codes for only one polypeptide, so it is called monocistronic. In prokaryotes structural genes have many coding sequences, so it is called polycistronic. |
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