Science questions

Question 1

Lipid soluble molecules, such as alcohols, cannot diffuse through the plasma membrane.

Select one:

  • a.False
  • b.True

Question 2

How do fat-soluble molecules normally get into a cell?

Select one:

  • a.They pass through protein pores in the cell membrane
  • b.They are absorbed by phagocytosis
  • c.They dissolve in the fat layers of the membrane and enter the cell by diffusion
  • d.They never get in

Question 3

The rate of diffusion of a particle across a membrane will increase if

Select one:

  • a.The thickness of the membrane increases
  • b.The number of protein channels increases
  • c.The size of the particle increases
  • d.The temperature decreases