Which of the following statements is correct about passive diffusion?
A) It requires an expenditure of energy by the cell.
B) It is a process in which molecules move from a region of higher concentration to a region of lower concentration (or down a concentration gradient) .
C) It is a process in which molecules move from a region of lower concentration to one of higher concentration (or up a concentration gradient) .
D) It may require a transport protein.
E) It involves movement of molecules down a concentration gradient and may require a transport protein.
Correct Answer:
Verified
Q23: Figure 4.3 Q24: Fimbriae and pili differ in that Q25: The difference between simple diffusion and facilitated Q26: Where are phospholipids most likely found in
A)there are
