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Biology Cell Transport
Test Description: Passive and Active Transports
Instructions: Answer all questions to get your test result.
1) Which of the following pieces of evidence would suggest that a substance entered a cell via active transport as opposed to passive transport?
A
ATP was required for transport
B
the substance moved from a high concentration to a low concentration
C
none of the above
D
the substance moved across the membrane via a carrier protein
2) Active transport is a way for molecules to move across the plasma (cell) membrane. When active transport is used to move molecules, what is required?
A
energy that the cell provides
B
osmosis
C
concentration gradient
D
very small molecules
3) Substances transported by facilitated diffusion
A
are limited to solvents
B
move passively through specific channels from an area of greater concentration to one of lower concentration
C
may flow to a region of higher concentration by the expenditure of energy
D
must have movements coupled to those of other substances
4) A lipid bilayer
A
permits water soluble molecules to pass through it
B
facilitates the passage of water soluble molecules through it
C
inhibits the passage of water soluble substances through it
D
actively transports water soluble molecules through it
5) Exocytosis is a process by which cells
A
release substances directly into the extracellular fluid through a pore
B
pass substances out of the cell in vesicles
C
release substances directly into the extracellular fluid through a pit
D
pass substances out of the cell through the membrane by osmosis
6) The methods of membrane transport that don't require protein channels or carriers are
A
phagocytosis
B
all of the choices
C
osmosis
D
diffusion
7) What is the main function of a selectively permeable membrane?
A
Regulates what enters and leaves the cell
B
Storage of chemicals
C
Breaks down molecules within the cell
D
Storage of water
8) Which of these would be least likely to diffuse across the phosopholipid bilayer of a cell membrane?
A
Water
B
carbon dioxide
C
sodium ions
D
oxygen
9) The sodium-potatsium pump is an example of
A
diffusion
B
facilitated diffusion
C
osmosis
D
active transport
10) The carrier molecules used in active transport are
A
protein
B
carbohydrates
C
lipids
D
calcium pumps
11) A red blood cell will lyse (or burst) when placed in which of the following kinds of solution?
A
hypertonic
B
none of the above
C
hypotonic
D
isotonic
12) Wilting of a plant occurs
A
when a plant with flexible cell walls is placed in a hypertonic solution
B
as a result of facilitated diffusion
C
if there is a rise in turgor pressure
D
if the plant is placed in an isotonic solution
13) Diffusion occurs
A
only in liquids
B
only through a lipid bilayer membrane
C
from an area of low concentration to an area of high concentration
D
from an area of high concentration to an area of low concentration
14) Sugar molecules can enter cells through the process of
A
facilitated diffusion
B
exocytosis
C
osmosis
D
ion pumps
15) Molecules that are too large to be moved across a cell membrane can be removed from the cell by
A
exocytosis
B
endocytosis
C
osmosis
D
facilitated diffusion
*select an answer for all questions
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