Help ty! According to the model represented in the diagram, which of the following would cause the cell to NOT express the lacZ, lacY, and lacA sequences? A) Binding the RNA polymerase to the gene
B) Preventing the repressor from binding to the lac operon
C) Removing the inducer
D) Transcribing the lacl sequence

What re the two main phrases of the cell cycle.

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point