The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than the cytoplasmic phosphate concentration. Because phosphate import depends on a pH gradient across the membrane, phosphate transport is most likely an example of which of the following transport processes?

A cell with a predominance of smooth endoplasmic reticulum is most likely specialized to carry out which of the following processes?

Which of the following statements best explains the ability of CAM plants to synthesize sugars in the daytime while keeping their stomata closed to reduce water loss?

Which of the following statements most accurately compares primary factors responsible for simple diffusion versus active transport?

Penicillin is an antibiotic that kills bacteria by binding to the active site of an enzyme involved in synthesis of the bacterial cell wall. Which of the following phenomena best describes the mechanism of action of penicillin?

Which of the following statements best explains the reason that lipids and proteins are free to move laterally in membranes?

Which of the following statements most accurately compares primary factors responsible for simple diffusion versus active transport?

Which of the following statements best explains the reason that lipids and proteins are free to move laterally in membranes?

Penicillin is an antibiotic that kills bacteria by binding to the active site of an enzyme involved in synthesis of the bacterial cell wall. Which of the following phenomena best describes the mechanism of action of penicillin?

How many turns of the Citric Acid Cycle are required for a single glucose to be metabolized?