Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The split-gene arrangement in eukaryotes represents an ancient feature of the genome. Reason (R): The presence of introns is reminiscent of antiquity, and the process of splicing represents the dominance of the RNA-world. In the light of the above statements, choose the most appropriate answer from

Step-by-step solution

In eukaryotes, the monocistronic structural genes have interrupted coding sequences, known as split genes. The coding sequences or exons are interrupted by introns. According to NCERT, the split-gene arrangements represent probably an ancient feature of the genome. The presence of introns is reminiscent of antiquity, and the process of splicing represents the dominance of the RNA-world. Thus, both the Assertion and the Reason are true, and the Reason correctly explains why the split-gene arrangement is considered a