Question

Select the incorrect statement from the following.

• A. Cistron is segment of DNA coding for a polypeptide.
• B. The coding sequence or expressed sequences are defined as exons
• C. Introns or intervening sequences appears in mature or processed RNA
• D. Split gene arrangement is present in eukaryotes.

Answer 1

Answer: (C)

Segment of DNA that carries complete information for synthesis of a polypeptide is called structural gene or cistron. In eukaryotes cistron shows split gene arrangement, it consists of functional region called exon and the non functional region called introns. During the process of splicing the introns are cut and removed and only exons are joined to form functional mRNA.