NEETZoologyMolecular Basis of Inheritance
What is the role of introns in genetics?
Options
- AThey appear in mature or processed RNA
- BThey do not appear in mature or processed RNA
- CThey are loosely defined as regulatory genes
- DNone of the above
Correct answer
B. They do not appear in mature or processed RNA
Step-by-step solution
The coding sequences or expressed sequences are defined as exons. Exons are said to be those sequences that appear in mature or processed RNA. The exons are interrupted by introns. Introns or intervening sequences do not appear in mature or processed RNA. The split-gene arrangement further complicates the definition of a gene in terms of a DNA segment. Inheritance of a character is also affected by promoter and regulatory sequences of a structural gene. Hence, sometimes the regulatory sequences are loosely defined