Which of the following would turn OFF the expression of the genes in an operon? A) repressor is released/removed from the operator (ie-repressor is NOT bound to the operator)

B) RNA polymerase binds to promoter

C)repressor binds to operator

D)whenever the cell needs the proteins specified by operon genes

E)repressor binds to RNA polymerase

answer: 2

explanation:

yes

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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explanation:

a physical change is being made.