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WorksheetsDiffusion and Osmosis
Total questions: 23
Worksheet time: 13mins
The cell membrane helps to maintain homeostasis by ...
regulating what enters and leaves the cell.
fighting foreign substances that enter the cell.
providing a rigid support system for the cell.
assisting the cell in movement
one layer
two layers
laminated
bilateral
Lipids
Carbohydrates
Proteins
Nucleic acids
E
B
C
A
A
C
D
E
The structure in the membrane that would most likely assist molecules entering and leaving the cell would be ...
Structure A
Structure B
Structure C
Structure D
The main difference between passive transport and active transport is ...
passive transport requires energy
active transport moves substances "down" their concentration gradient
active transport requires additional energy from the cell
passive transport moves substances "up" their concentration gradient
When solutes diffuse, they move ....
from low concentration to high concentration
from high concentration to low concentration
"up" the concentration gradient
randomly
Osmosis is strictly about ....
the movement of solutes
the movement of solutes across a membrane
the movement of gases
the movement of water across a membrane
Particles diffuse naturally due to ...
gravity
the kinetic energy of the particles
attractive forces between the atoms in the different particles
the motion of the Earth
In the lab we did with food coloring in hot and cold water, we observed that ....
the rate of diffusion decreases when the particles are hot.
the rate of diffusion decreases when the particles are cold.
the rate of diffusion was not affected by temperature.
particles cannot diffuse in very cold water.
The U-shaped tube has 2 different mixtures of salt water in it and the 2 solutions are separated from each other by a semi-permeable membrane. The membrane is not permeable to salt but it is to water. What will the tube look like in a few hours if it is left to rest a it is?
The salt particles (red dots) will move to the right side of the tube.
The salt particles (red dots) will move to the left side of the tube.
water will move to the left side of the tube.
water will move to the right side of the tube.
This tube has 2 solutions in it. They are separated by a semipermeable membrane at the bottom of the tube. How would you describe the 2 solutions in the tube?
Side A is hypertonic to side B
Side A is hypotonic to side B
Side A is isotonic to side B
Side B is hypertonic to side A.
The 2 characteristics that determine if a molecule can diffuse through a plasma membrane are _________ and ________ .
mass and state
density and charge
color and state (solid, liquid or gas)
size and charge
A molecule that could diffuse through the cell membrane would have to be ....
light-weight and opaque
non-polar and small
heavy and small
polar and small
An example of a molecule that could MOVE BY DIFFUSION across a cell membrane is ....
oxygen (O2)
glucose
water
proteins
Solutes in a solution will continue to diffuse until ....
they get old and worn out
they lose their charges
they are equally dispersed.
they become too small
Once the particles in a solution hit equilibrium, they ....
quit moving
move back in the same direction they came from
continue to move in the direction they were going
continue to move but in no particular direction
If the semi-permeable membrane in this image is not permeable to the solute (sugar) but is permeable to water, what will occur next?
The overall net change in molecules will be water molecules into solution B.
The overall net change in molecules will be water molecules into solution A.
The overall net change in molecules will be sugar molecules into solution A.
Their will be no (zero) overall net change in any of the molecules (water or sugar).
Plants rely on living in a hypotonic environment much of the time so their ___________ fills and they can stand upright.
chloroplasts
cytoplasm
cell wall
central vacuole
In a hypotonic environment, an animal cell might experience ________ but a plant cell would experience __________ .
plasmolysis; cytolysis
cytolysis; turgor pressure
turgor pressure; plasmolysis
turgor pressure; cytolysis
A wet mount of a live paramecium (a single-celled organism) is prepared using a highly concentrated salt water solution. What will happen to the cell?
it will shrivel
cytolysis will occur
it will swell
turgor pressure will occur
A plant cell is placed in a beaker of highly concentrated salt water. What will happen to the cell?
it will swell
plasmolysis will occur
cytolysis will occur
turgor pressure will build
