Which is an arrangement of genes consisting of an operator, a promoter, and a repressor?
1) rna polymerase
2)anticodon
3)codon
4)operon

The correct answer is 4)operon

Explanation:

An operon is a set of genes that contains its own promoter, operator and repressor. All genes present in an operon are expressed in a single unit which has a single promoter. They are commonly found in prokaryotes.

An operon consist some structural gene which is transcribed by RNA polymerase when polymerase binds to promoter region for example lac operon have three structural gene Z, Y, and A.

The operator overlaps the promoter region and binds with the regulatory proteins so it regulates the transcription of the operon. Repressor gene synthesis repressor protein which binds to operator and blocks transcription of structural genes.

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you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.