Unit 3: The Cell--the Cell Membrane, Diffusion, & Osmosis
This quiz will test your understanding of concepts related to the plasma membrane, diffusion, and osmosis as they are taught in the MCPS biology course.
- 1.Iodine can test for the presence of ____________.
- A.
Glucose
- B.
Fat
- C.
Protein
- D.
Starch
- 2.In the diffusion lab, iodine was place into a beaker of water and _________ was placed inside special semipermeable tubing.
- A.
Water
- B.
Iodine
- C.
Starch
- 3.If iodine comes into contact with starch, the iodine will become __________.
- A.
Dark purple/black
- B.
Hot
- C.
Brownish yellow
- 4.In the diffusion lab, the special tubing represented ________.
- A.
The mitochondria
- B.
The nucleus
- C.
The plasma membrane
- 5.
In our diffusion lab, we placed a bag containing starch inside a beaker with water and iodine.What happened?- A.
The water in the beaker turned purple.
- B.
The water in the beaker evaporated.
- C.
The starch in the bag turned purple.
- 6.
The change of color inside the bag indicated which of the following?
- A.
Iodine is able to pass through the bag.
- B.
Starch is able to pass through the bag.
- C.
Both starch and iodine can pass through the bag.
- 7.___________ is the movement of molecules from an area of high concentration to an area of low concentration.
- A.
Dissolution
- B.
Diffusion
- C.
Polarity
- 8.A cell that is 95% water is placed inside a solution that is 100% water. What will happen?
- A.
The cell will swell because water will enter it.
- B.
The cell will swell because it will produce more sugar.
- C.
The cell will shrink because it has less water than the solution.
- 9.A cell is placed in a hypertonic solution. This means that the percentage of water is ___.
- A.
Greater in the solution.
- B.
Greater in the cell
- C.
The same in the cell and the solution.
- 10.A piece of potato is placed in pure water. The potato cells are not 100% water. Relative to the potato cells, the pure water is ___________.
- A.
Isotonic
- B.
Hypertonic
- C.
Hypotonic
- 11.Potato cells placed in a hypotonic solution would increase in mass because ______.
- A.
The stuff in the solution would cause the cells to divide rapidly.
- B.
Water would enter the cells.
- C.
They would increase their production of sugar.
- 12.A fish that is accustomed to living in salt water is placed in fresh water. What do you predict might happen to the cells of the fish?
- A.
They might shrink up and cause the fish to die.
- B.
They would become healthier because the water is so fresh.
- C.
They might burst and cause the fish to die.
- 13.If the concentration of solute is the same both inside a cell and in the solution it's placed into, then the solution is said to be _____________.
- A.
Hypertonic
- B.
Hypotonic
- C.
Isotonic
- 14.If the left side of the beaker were hypertonic compared to the right side, what would happen to the level of water on both sides?
- A.
The left side would go up and the right side would go down.
- B.
The right side would go up and the left side would go down.
- C.
The level of water on both sides of the beaker would stay the same.
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