Question

in a passive process (passive transport) across a cell’s plasma membrane, __ differences drive the movement, while in an active process, the cell provides to power the transport process. a) driving force, differential permeability b) differential permeability, driving force c) atp, concentration d) concentration, atp question 2 (mandatory) (0.5 points) the unassisted diffusion of solutes through a selectively permeable membrane is called ; whereas when molecules are transported across the plasma membrane with the assistance of a protein carrier molecule is called __. a) active transport, osmosis b) simple diffusion, facilitated diffusion c) facilitated diffusion, simple diffusion d) osmosis, active transport

Explanation:

First Question (Passive and Active Transport Driving Forces)

In passive transport (like diffusion, osmosis), the driving force is concentration differences (differential permeability relates to membrane properties, but the force moving substances is concentration gradient). In active transport, the cell uses ATP (energy currency) to move substances against gradients. So the correct pairing is concentration (driving passive) and ATP (driving active). Option D matches: "concentration, ATP".

Unassisted (no protein help) diffusion of solutes is simple diffusion. When a protein carrier assists, it's facilitated diffusion. So the first blank is simple diffusion, the second is facilitated diffusion. Option B matches: "simple diffusion, facilitated diffusion".

Answer:

D. concentration, ATP

Question 2 (Membrane Transport Types)