When is the lac operon most active? a: when glucose levels are high and lactose is present . b: when glucose levels are low and lactose is absent . c: when glucose levels are low and lactose is present . d: when glucose levels are high and lactose is absent?

5. what might happen if you were to remove all light from the setup after the discs have all become buoyant? describe what you would see. explain why this would occur with relation to cellular processes like respiration. [referring to an ap biology lab in which spinach discs are placed in a sodium bicarbonate solution and exposed to light.]