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Cells Test
1. The diagram below shows how a paramecium maintains homeostasis. A paramecium normally lives in a
hypotonic environment in which water continually diffuses into the cell. To maintain homeostasis, the
paramecium must pump out large amounts of water using its contractile vacuole.
Paramecium in a hypotonic environment
If the paramecium is then placed in a hypertonic environment, which of the following will occur? (4B)
A. Water will diffuse into the paramecium
B. Water will diffuse out of the paramecium
C. Salt will be pumped out of the paramecium by the vacuole
D. Salt will be pumped into the paramecium by the vacuole
2. The cellular process known as the sodium-potassium pump was discovered in the 1950s by Jens Christian Skou, a
Danish scientist. This process is a form of active transport that moves three sodium ions to the outside of a cell
for every two potassium ions that it moves into the cell. Which of these best explains why energy is needed for
active transport? (4B)
A. Ions are negatively charged
B. Ions are attached to large proteins
C. Ions are trapped inside the plasma membrane
D. Ions are moved against the concentration gradient
3. What evidence does not support the evolution of chloroplasts and mitochondria from prokaryotic cells? (7G)
A. Double membranes of the organelles
B. Similar methods of reproduction
C. Fossil record
D. Presence of circular DNA
4. Which cellular process takes place in the ribosomes that are bound to the endoplasmic reticulum? (4B)
A. The breakdown of waste material
B. The conversion of radiant energy to glucose
C. The synthesis of new proteins
D. The replication of nucleic acids
5. Which structure can be found in both eukaryotic and prokaryotic cells? (4A)
A. Mitochondria
B. Nucleus
C. Chloroplast
D. Nucleic acid
6. Four of the six kingdoms are comprised of organisms that contain eukaryotic cells. Which of the following
structures in a cell would not be evidence that the cell is eukaryotic? (4A)
A. Cell membrane
B. Mitochondria
C. Vacuoles
D. Nuclear membrane
Use the following scenario to answer the next two questions.
A few drops of Lugol’s iodine solution placed in a beaker of water will turn
the water red. A starch solution was poured into a length of dialysis tubing,
and the ends were tied. The starch solution was white.
The tubing was then dropped into the beaker of iodine solution. After 10
minutes, the white starch solution turned black, and the iodine water
remained red.
7. If the dialysis tubing represents a cell
membrane in this demonstration, what process
is being observed in the changing color of the
starch solution? (4B)
A. Iodine cannot pass through a
membrane
B. Starch can easily be diffused through a
membrane
C. A permeable membrane diffuses
chemicals in and out of its surface
D. A semipermeable membrane will
diffuse selected chemicals
8. Which of the following research questions best
describes the experimental setup in the
diagram above? (4B)
A. How does temperature affect the rate
of solubility of the iodine?
B. Does molecule size determine
permeability of a membrane?
C. Which color of molecule will move the
fastest across a membrane?
D. How does the pressure of the water in
the beaker affect the permeability of
the membrane?
9. Which of the following is a graphical depiction of an example of active transport taking place? (4B)
A
B
C
D
10. A group of cells together form a/an: (10C)
A. Organ
B. Organ System
C. Tissue
D. Wall
11. What happens during diffusion? (4B)
A. Particles move slightly but stay in almost the same place
B. Particles move to different areas but always return to their starting point
C. Particles move from an area that is more concentrated to an area that is less concentrated
D. Particles move from an area that is less concentrated to an area that is more concentrated
12. Explain the process illustrated in the diagram. (4B)
A. Passage of water molecules through a semipermeable membrane to equalize concentration
B. Transport of molecules across a membrane from a high to low concentration by means of a carrier
molecule
C. Movement of molecules against a concentration gradient, expending energy
D. Separation of suspended particles from a fluid environment through a porous membrane
13. What additional characteristic (X) belongs in the central section of the Venn diagram? (4A)
A.
B.
C.
D.
Ribosome
Mitochondria
Chloroplast
Endoplasmic Reticulum
14. The brain is an organ because it: (10C)
A. Enables the body to think, comprehend, and react
B. Requires oxygen, water and nutrients in order to carry out its functions
C. Consists of different tissues that work together to perform complex functions
D. Is the basic organizational unit of structure and function in living things
15. Which of the following is not a way in which cells maintain homeostasis? (4B)
A. They take in water and release waste
B. The respond to stimuli in their environment
C. They allow water to build up within their membranes
D. They maintain concentrations of water and minerals within certain levels
16. Mitochondria are the energy sources in eukaryotic cells. Which of the following specialized cells would contain
the most mitochondria? (5B)
A. Dermal (skin)
B. Meristem
C. Red Blood Cell
D. Muscle
17. How is active transport different from passive transport? (4B)
A. Both active and passive transport occur within plant cells, but only active transport occurs within animal
cells
B. Both active and passive transport occur within animal cells, but only active transport occurs within plant
cells
C. Passive transport uses energy to move materials across a cell membrane against a concentration
gradient, while active moves materials across a cell membrane in the direction of the concentration
gradient, without using energy
D. Active transport uses energy to move materials across a cell membrane against a concentration
gradient, while passive transport moves materials across a cell membrane in the direction of a
concentration gradient, without using energy
18. Where is DNA found in a prokaryotic cell? (4A)
A. Inside the nucleus
B. Trapped in the mitochondria
C. Prokaryotes don’t have DNA
D. Floating in the cytoplasm
19. This diagram shows cellular activity across a cell membrane. (11A)
Glucose in high concentrations
outside the cell
Cell membrane
Glucose in low concentrations
inside the cell
Which two processes does this diagram most directly model?
A. Energy conversions and synthesis of new molecules
B. Synthesis of new molecules and homeostasis
C. Transport of molecules and energy conversions
D. Homeostasis and transport of molecules
20. Some students used information they gathered from lab investigations to prepare a table. They entered the
table in their lab notebooks.
Cell 1
Is smaller than 5 micrometers
Does not have a nucleus
Does not have membrane-bound
organelles
Has circular DNA
Cell 2
Is larger than 10 micrometers
Has a membrane-bound nucleus
Has membrane-bound organelles
Has linear DNA
Which of these correctly identifies the two cells described in the table? (4A)
A. Cell 1 is eukaryotic, and cell 2 is prokaryotic
B. Cell 1 is prokaryotic, and cell 2 is eukaryotic
C. Both cell 1 and cell 2 are eukaryotic
D. Both cell 1 and cell 2 are prokaryotic