What is the function of the operator in an operon a. provide a site on the dna where the repressor can bind and stop transcription b. provide a site on the dna where rna polymerase can bind to begin transcription c. code for the repressor protein d. code for the rna polymerase protein

The answer is; A

The operator site is usually associated with the promoter region of the operon. This region is bound by a repressor. The repressor acts as a physical barrier so the RNA polymerase  does not bind to its promoter, or even if it binds, does not proceed to transcribe the genes.

answer; ///i believe the correct answer is (

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.