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1. If the external environment of a living cell has a
8. The process of osmosis would explain the net
greater concentration of salt than the cytoplasm
movement of water into a cell if the percentage
within the cell, the cell will tend to
of
(1) divide
(3) increase its size
(1) water was 90% inside the cell and 95%
(2) excrete salt
(4) lose water
outside the cell
(2) protein was 30% inside the cell and 35%
2. The net flow of materials through the membrane
outside the cell
of a cell against a concentration gradient is
(3) water was 95% inside the cell and 90%
known as
outside the cell
(1) active transport
(3) circulation
(4) water and protein was equal inside and
(2) passive transport
(4) transpiration
outside the cell
3. Water and minerals move from the soil into a
9. The end products of digestion enter the cells of
plant by the process of
vertebrate by the process of
(1) diffusion, only
(1) absorption
(3) emulsification
(2) active transport, only
(2) osmosis
(4) egestion
(3) passive transport and hydrolysis
(4) both diffusion and active transport
10. Human red blood cells placed in a 2 % salt
solution appear to shrink, but those placed in a
4. Which process would include a net movement of
0.4 % salt solution burst. Which statement best
sugar molecules through a membrane from a
supports these observations?
region of lower concentration to a region of
(1) Salt causes cell walls to swell.
higher concentration?
(2) Salt is actively transported across cell
(1) osmosis
(3) active transport
membranes.
(2) cyclosis
(4) passive transport
(3) The nucleus does not regulate water balance
in a cell.
5. A red blood cell placed in distilled water will
(4) Osmosis may occur in either direction
swell and burst due to the diffusion of
across the cell membrane.
(1) salt from the red blood cell into the water
11. The diagram below represents the change that
(2) water into the red blood cell
occurred after a fluid was added to a wet mount
(3) water from the blood cell into its
of some elodea leaf cells.
environment
(4) salt from the water into the red blood cell
6. Red blood cells contain a higher concentration of
potassium than the surrounding blood plasma
does. This higher concentration is maintained by
the process of
(1) cyclosis
(3) simple diffusion
(2) osmosis
(4) active transport
7. Since cyanide is a poison that limits a cell's
ability to manufacture ATP, a cell containing
Which fluid was most likely added to the wet
cyanide is least likely to carry on the process of
mount?
(1) passive transport
(3) active transport
(1) salt solution
(3) distilled water
(2) osmosis
(4) diffusion
(2) tap water
(4) iodine solution
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12. Which statement best explains why gas transport
14. After a cookie has been digested, glucose
takes place as represented in the diagram below?
molecules enter the bloodstream by the process
of
(1) phagocytosis
(3) ingestion
(2) diffusion
(4) pinocytosis
15. The process in which the net movement of
molecules is from a region of lower
concentration to a region of-higher concentration
is known as
(1) active transport
(3) osmosis
(2) diffusion
(4) passive transport
16. A biologist observed a plant cell in a drop of
water and illustrated it as in diagram A . He added
a 10% salt solution to the slide, observed the cell,
(1) The carbon dioxide concentration is
and illustrated it as in diagram B .
greater in the cells than in the
environment.
(2) The carbon dioxide is absorbed into the
environment by active transport.
(3) The carbon dioxide concentration in the cells
is equal to that in the environment.
(4) The carbon dioxide is transported to the
environment by a transport system.
The change in appearance of the cell resulted
from more
13. The arrows in the diagrams below represent the
(1) salt flowing out of the cell than into the cell
direction of movement of a certain type of
(2) salt flowing into the cell than out of the cell
molecule through the cell membrane of two
(3) water flowing into the cell than out of the cell
different cells. The dots represent the relative
(4) water flowing out of the cell than into the
concentrations of this molecule.
cell
17. A root hair cell may continue to absorb minerals
even though the cytoplasmic concentration of
these minerals is greater inside the cell than in
the soil. This absorption is accomplished chiefly
as a result of
(1) passive transport
(3) diffusion
(2) active transport
(4) osmosis
Which processes are illustrated in the diagrams?
18. Which process utilizes cellular energy to move
(1) phagocytosis and diffusion
particles through a membrane?
(2) pinocytosis and osmosis
(1) osmosis
(3) active transport
(3) active transport and diffusion
(2) passive diffusion
(4) transpiration
(4) dehydration synthesis and circulation
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