Question

which is an arrangement of genes consisting of an operator, a promoter, and a repressor?
○ rna polymerase
○ anticodon
○ codon
○ operon

Explanation:

• RNA polymerase is an enzyme for transcription, not a gene arrangement.
• Anticodon is a sequence on tRNA, not related to operator/promoter/repressor.
• Codon is a triplet on mRNA for amino acid coding, not a gene arrangement.
• Operon is a gene arrangement with operator, promoter, and repressor (e.g., lac operon).

Answer:

D. operon