When E. coli is grown on glucose, and there is no lactose available
A) lactose molecules bind to the lac repressor.
B) the lac repressor binds to the operator of the lac operon.
C) RNA polymerase binds to the promoter of the lac operon.
D) the lac genes are transcribed into messenger RNA.

Ineed to know why d is the correct answer asap

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity hurry!