Multiple Choice
What is active transport?
A) diffusion of molecules within a cell
B) movement of molecules into or out of a cell against a concentration gradient
C) movement of molecules into or out of a cell down a concentration gradient
D) movement of molecules into or out of a cell using special proteins and not requiring an expenditure of energy
E) rapid movement of molecules in a solution
Correct Answer:
Verified
Correct Answer:
Verified
Q11: The bacterium Vibrio cholerae releases a toxin
Q12: If a frog egg cell is placed
Q13: Plasma membranes are BEST described as a:<br>A)double
Q14: If the radius of one cell were
Q15: Based on these four illustrations of diffusion,
Q17: Osmosis is the diffusion of water molecules
Q18: What structure in the membrane causes plasma
Q20: ISO membranes are inside-out membrane vesicles used
Q32: Facilitated diffusion and active transport both require_for
Q40: Communication between cells occurs via _in plant