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- 1. Multiple Choice
In the diagram of the plasma (cell) membrane shown below, which structures are indicated by letters A and B?
A –– proteins; B –– lipids
A –– fats; B –– carbohydrates
A –– cellulose; B –– fats
A –– water; B –– proteins
- 2. Multiple Choice
The diagram below represents the fluid mosaic model of a plasma membrane.
What do letters X and Y indicate?
X indicates lipids and Y indicates proteins.
X indicates pores and Y indicates cellulose.
X indicates proteins and Y indicates lipids.
X indicates nuclei and Y indicates ribosomes.
- 3. Multiple Choice
A characteristic common to both diffusion and active transport is that
enzymes are required
oxygen is moved across a membrane
ATP is needed
the movement of molecules occurs
- 4. Multiple Choice
Damage to which structure will most directly disrupt water balance within a single-celled organism?
ribosome
cell membrane
nucleus
chloroplast
- 5. Multiple Choice
Which structure is most directly responsible for maintaining homeostasis in all cells?
chloroplast
cell membrane
centriole
cell wall
- 6. Multiple Choice
The diagram below represents a portion of a cell
membrane.
The arrow indicates that the cell membrane is carrying out the process of
respiration
cell recognition
diffusion
active transport
- 7. Multiple Choice
The diagram below represents the results of the net movement of a specific kind of molecule across a living cell membrane.
The movement of molecules from side A to side B is an example of the process of
active transport
chromatography
cellular respiration
diffusion
- 8. Multiple Choice
The diagram below represents a cell and some molecules in its environment.
Which molecule would require the use of energy in order to be brought into the cell?
1
2
3
4
- 9. Multiple Choice
An investigation was set up to study the movement of water through a membrane. The results are shown in the diagram below.
Based on these results, which statement correctly predicts what will happen to red blood cells when they are placed in a beaker containing a water solution in which the salt concentration is much higher than the salt concentration in the red blood cells?
The red blood cells will absorb water and increase in size.
The red blood cells will lose water and decrease in size.
The red blood cells will first absorb water, then lose water and maintain their normal size.
The red blood cells will first lose water, then absorb water, and finally double in size.
- 10. Multiple Choice
A biologist observed a plant cell in a drop of water as shown in diagram A. The biologist added a 10% salt solution to the slide and observed the cell as shown in diagram B.
The change in appearance of the cell resulted from
more salt moving out of the cell than into the cell
more salt moving into the cell than out of the cell
more water moving into the cell than out of the cell
more water moving out of the cell than into the cell
- 11. Multiple Choice
A student observed a wet mount of some stained plant cells in the high-power field of a compound light microscope. Diagram A represents the general appearance of these cells. The student then added several drops of a liquid to the wet mount and continued the observations. Diagram B represents the general appearance of the cells a few minutes after adding the liquid.
The liquid that the student added to the wet mount was most likely
salt water
distilled water
pond water
tap water
- 12. Multiple Choice
A substance is most likely to diffuse into a cell when
it is a large organic food molecule such as protein or starch
it is enclosed in an organelle such as a vacuole
the concentration of the substance is greater outside the cell than inside
the pH of the substance is greater than the pH of the cell
- 13. Multiple Choice
The concentration of potassium is higher in red blood cells than in the surrounding blood plasma. This higher concentration is maintained by the process of
circulation
diffusion
active transport
excretion
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