What is an operon in bacterial gene regulation (such as the lac operon)? (Hard)
Answer and explanation
Correct answer: A. A cluster of genes transcribed together under the control of a single promoter and operator
- Step 1: In prokaryotes, functional genes of a related metabolic pathway are grouped physically on the chromosome. Step 2. An operon comprises structural genes, an operator, and a promoter transcribed as a single polycistronic mRNA. Answer: A cluster of genes transcribed together under the control of a single promoter and operator. Why not the others: Protein degradation complex is proteasome; extrachromosomal replicon is plasmid; telomeric repeats are eukaryotic ends.
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