WorksheetsDiffusion Through a Membrane
Total questions: 17
Worksheet time: 51mins
Name
Class
Date
1.
Cell membranes are said to be selectively permeable. Which statement best explains what selectively permeable means?
a)
The cell membrane prevents any harmful substance from entering the cell.
b)
The cell membrane lets certain substances enter the cell and keeps certain substances out of the cell.
c)
The cell membrane allows only large molecules to diffuse into the cell.
d)
The cell membrane has pores that let only water and glucose into the cell and carbon dioxide out.
2.
Base your answer to the question on the diagram below and on your knowledge of biology. The diagram represents two solutions, A and B, separated by a selectively permeable membrane. Which statement best describes the outcome after 20 minutes?
a)
Solution A will contain approximately the same number of glucose molecules as solution B.
b)
Solution A will contain all of the water molecules.
c)
Solution B will remain unchanged.
d)
Solution B will lose all of the glucose molecules to solution A.
3.
The diagram below represents a cell in water. Formulas of molecules that can move freely across the cell membrane are shown. Some molecules are located inside the cell and others are in the water outside the cell.
Based on the distribution of these molecules, what would most likely happen after a period of time?
Based on the distribution of these molecules, what would most likely happen after a period of time?
a)
The concentration of O2 will increase inside the cell.
b)
The concentration of CO2 will remain the same inside the cell.
c)
The concentration of O2 will remain the same outside the cell.
d)
The concentration of CO2 will decrease outside the cell.
4.
A substance is most likely to diffuse into a cell when
a)
it is a large organic food molecule such as protein or starch
b)
it is enclosed in an organelle such as a vacuole
c)
the concentration of the substance is greater outside the cell than inside
d)
the pH of the substance is greater than the pH of the cellListen
5.
The diagram below shows the relative concentration of molecules inside and outside of a cell.
Which statement best describes the general direction of diffusion across the membrane of this cell?
Which statement best describes the general direction of diffusion across the membrane of this cell?
a)
Glucose would diffuse into the cell.
b)
Protein would diffuse out of the cell.
c)
Oxygen would diffuse into the cell.
d)
Carbon dioxide would diffuse out of the cell.
6.
A red onion cell has undergone a change, as represented in the diagram below. This change is most likely due to the cell being placed in
a)
distilled water
b)
salt water
c)
light
d)
darkness
7.
In the diagram below; the dark dots indicate small molecules. These molecules are moving out of the cells as indicated by the arrows. The number of dots inside and outside of the two cells represents the relative concentrations of the molecules inside and outside of the cells. ATP is being used to move the molecules out of the cell by
a)
Cell A
b)
Cell B
c)
both Cell A and B
d)
neither Cell A or B
8.
The picture below is an example of _________________.
a)
osmosis
b)
isotonic
c)
diffusion
d)
active transport
9.
What is diffusion?
a)
when molecules move
b)
when molecules move from a high concentration to a low.
c)
no movement
d)
molecules move everywhere
10.
When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of
a)
Osmosis
b)
Diffusion
c)
Equilibrium
11.
The movement of molecules against a concentration gradient
a)
simple diffusion
b)
facilitated diffusion
c)
active transport
d)
osmosis
12.
The picture is an example of...
a)
active tranport
b)
passive transport
c)
diffusion
d)
osmosis
13.
If there is a higher concentration of O2 in the lungs than in the blood stream. . .
a)
O2 will diffuse to the blood stream.
b)
O2 will diffuse to the lungs.
c)
CO2 diffuse from the blood stream to the lungs
d)
Water will move by osmosis from the bloodstream to the lungs
14.
What is it called when large molecules move through the protein channels?
a)
facilitated diffusion
b)
diffusion
c)
osmosis
d)
active transport
15.
In passive transport, molecules move from an area of _______ concentration to an area of ________ concentration until they reach equilibrium.
a)
low to high
b)
high to higher
c)
low to lower
d)
high to low
16.
Isotonic solution is balanced or equal
a)
true
b)
false
17.
A blood cell in a hypotonic solution would
a)
It would be fine, it is balanced
b)
It would shrink and soon look like a raisin because the solution around the cell has more water inside than outside
c)
It would swell and stretch until it pops because there is less water inside the cell than outside of it
d)
No one knows until you do the experiment, they are all different
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