Question

match the term with its correct description:

a. energy
b. facilitated diffusion
c. endocytosis
d. passive transport
e. active transport
f. exocytosis
g. carrier protein
h. channel protein

1. transport protein that provides a tube-like opening in the plasma membrane through which particles can diffuse
2. is used during active transport but not passive transport
3. process by which a cell takes in material by forming a vacuole around it
4. particle movement from an area of higher concentration to an area of lower concentration
5. process by which a cell expels wastes from a vacuole
6. a form of passive transport that uses transport proteins
7. particle movement from an area of lower concentration to an area of higher concentration
8. transport protein that changes shape when a particle binds with it

Explanation:

Match descriptions 1 to 4

1. A tube-like opening in the plasma membrane is a channel protein (h).
2. Active transport requires energy (a), whereas passive transport does not.
3. Taking in material by forming a vacuole is endocytosis (c).
4. Movement from higher to lower concentration is passive transport (d).

Match descriptions 5 to 8

1. Expelling wastes from a vacuole is exocytosis (f).
2. Passive transport using transport proteins is facilitated diffusion (b).
3. Movement from lower to higher concentration is active transport (e).
4. A transport protein that changes shape upon binding is a carrier protein (g).

Answer:

1. (h) channel protein
2. (a) energy
3. (c) endocytosis
4. (d) passive transport
5. (f) exocytosis
6. (b) facilitated diffusion
7. (e) active transport
8. (g) carrier protein