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1
What conditions cause the contractile vacuole to fill with water?
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AThe concentration of water is greater outside the cell than inside the cell.
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BThe temperature of water in the vacuole is higher than the temperature of its environment.
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CThe concentration of water inside the cell is the same as the concentration outside the cell.
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DThe temperature of water in the vacuole is lower than the temperature of its environment.
2
The diagram shows molecules that a mitochondrion uses and produces during a cellular process.
Which other molecule is a product of this process?
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A
DNA
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B
RNA
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C
C6 H12 O6
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D
ATP
3
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Anitrogen
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Bproteins
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Cstructure
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Denergy
4
A type of cellular transport is shown.
Which description best identifies this type of cellular transport?
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A
Active transport, because energy is being used to move molecules against the concentration gradient
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B
Facilitated diffusion, because energy is being used to move molecules with the concentration gradient
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C
Osmosis, because energy is not being used to move molecules with the concentration gradient
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D
Endocytosis, because energy is not being used to move molecules against the concentration gradient
5
A table of four types of carbohydrates is shown.
Which list correctly matches the functions to the types of carbohydrates?
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AEnergy: glycogen and starchStructure: cellulose and chitin
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BEnergy: cellulose and chitinStructure: glycogen and starch
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CEnergy: chitin and glycogenStructure: cellulose and starch
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DEnergy: cellulose and starchStructure: chitin and glycogen
6
How are ferritin and glycogen similar in their primary functions for an organism?
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ABoth store materials needed by the organism.
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BBoth store energy used by the organism.
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CBoth support the structure of the organism.
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DBoth store information for the organism.
7
Which table headings should the student use for the two groups?
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A
-
B
-
C
-
D
8
Students use a microscope to look for structures present in four different cells. The students placed an X for each structure that was viewed for each cell on the table shown.
Which cell that was viewed is most likely a prokaryote?
-
A
Cell W
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B
Cell X
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C
Cell Y
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D
Cell Z
9
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AThe products of photosynthesis serve as the reactants in cellular respiration to provide chemical energy.
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BThe products of photosynthesis combine with the reactants in cellular respiration to remove ATP from cells.
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CThe products of photosynthesis inhibit the reactants in cellular respiration in the presence of light.
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DThe products of photosynthesis change the structure of the reactants in cellular respiration in the presence of light.
10
If carbon dioxide were removed from a plant’s environment, what would you expect to happen to its production of sugars (glucose)?
-
A
The same number of sugars will be produced
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B
Carbon dioxide does not affect a plant’s ability to make sugars
-
C
More sugars will be produced
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D
No sugars will be produced
11
-
A
Temperature of 27°C and a pH of 4
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B
Temperature of 37°C and a pH of 6
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C
Temperature of 40°C and a pH of 8
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D
Temperature of 50°C and a pH of 10
12
People who have Alzheimer’s disease experience an increasing loss of brain function and cognition over time. Alzheimer’s is characterized by a buildup of abnormal protein fragments that damage brain cells. Recently, scientists have discovered an enzyme, BACE2, that decreases these abnormal protein fragments in the brain of a person with Alzheimer’s disease. Which statement explains how BACE2 most likely works?
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A
BACE2 breaks down into smaller pieces that react with the abnormal protein fragments, forming more complex molecules.
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B
BACE2 molecules link several abnormal protein fragments together, forming a complete protein.
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C
BACE2 speeds up the reaction that breaks down the abnormal protein fragments.
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D
BACE2 is a reactant that combines with the abnormal protein fragments.
13
An advertisement for a health supplement for dogs claims to build lean muscle and strengthen tendons and ligaments, as well as provide energy. Which two biomolecules must the supplement contain to provide these benefits?
-
A
Carbohydrates and lipids
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B
Proteins and carbohydrates
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C
Nucleic acids and carbohydrates
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D
Lipids and nucleic acids
14
When mammals get an infection, their internal body temperature often rises 2 to 3 degrees Celsius. The body gets the energy it needs to react to an infection by —
-
A
increasing the rate of cellular division
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B
decreasing the rate of glucose movement into the cell
-
C
increasing the rate of cellular respiration in mitochondria
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D
decreasing the rate at which carbon dioxide is removed from the cell
