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Diffusion moves molecules in this direction

Lactose is a disaccharide composed of glucose and galactose. If one lactose molecule enters the active site of the enzyme lactase, what will be the result?

A cell is treated with a drug that prevents protein synthesis. The structure most likely to be affected is

The figure above illustrates a eukaryotic cell. Which of the following best describes how the three structures indicated by the arrows work together?

In the image above, what view would somebody see if they put a normal red blood cell (RBC) into a hypertonic solution?  

In Experiment A, no solutes can diffuse through the cell membrane. What is the tonicity of the solution?

The diagram above represents a typical rod- shaped bacterium. Which of the following best describes a feature shown in the diagram that is unique to bacteria? 


A scientist placed red blood cells in a hypotonic solution. Which of the following is the most likely effect this solution will have on the cells?

CHOOSE ALL THAT APPLY: Which of these statements is TRUE about the cell membrane?

A scientist placed red blood cells in an isotonic solution. Which of the following is the most likely effect this solution will have on the cells?