An operon (in prokaryotes) is
- Acheck_circle
A cluster of co-regulated genes transcribed together as one mRNA from a single promoter
- B
A single gene whose expression is regulated by multiple transcription factors
- C
A regulatory protein that activates or represses transcription at multiple genes
- D
A cluster of unrelated genes each transcribed from its own separate promoter
Explanation
Operons enable coordinate regulation of related genes. They're rare in eukaryotes (which use individual gene regulation).