In split genes, the coding sequences are called as

• A. Cistrons
• B. Operons
• C. Exons
• D. Introns

In the context of split genes, the coding sequences are referred to as Exons. These are the parts of a gene that are expressed and translated into proteins, while the non-coding regions, known as introns, are spliced out during the process of gene expression.

Key Terms

• Cistrons: Another term for genes, but not specifically for coding sequences.
• Operons: A group of genes regulated together, primarily found in prokaryotes.
• Exons: Coding sequences that remain in the final mRNA.
• Introns: Non-coding sequences that are removed during RNA processing.

Summary

To summarize, in split genes, the correct answer is C. Exons, as they represent the coding portions that contribute to protein synthesis.