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- 1. Multiple Choice
Recently state parks like Yellowstone which contain varieties of flowering trees and shrubs have started to erect signs that state, take nothing but pictures.
Which argument best supports why these signs are being placed?
Flowering tree and shrub ecosystems can never fully recover once humans have adversely affected them because they are non renewable.
Removal of flowering tree and shrubs will have a direct impact on the ecosystems by increasing biodiversity
Humans cause damage to the stability of the ecosystems by removing the flowering tree and shrubs.
Flowering tree and shrubs make the state parks more attractive and increase revenue for the parks.
- 2. Multiple Choice
Which explanations accurately describe how cell structures interact in order to maintain homeostasis? Select all that apply.
The smooth endoplasmic reticulum and Golgi produce lysosomes.
Molecules can enter the cell by passing through the cell membrane and may take part in chemical reactions within the cytoplasm.
The cell wall and vacuole function to maintain the structure of plant cells
The rough endoplasmic reticulum produces the lipid components of the cell membrane.
- 3. Multiple Choice
After 70 years of absence, the gray wolf was reintroduced to Yellowstone National Park in 1995. After 1995, the elk population, which had been exploding, began to decline in numbers. Willows and aspen trees began to grow more abundantly on riverbanks. The beaver population began to increase, and songbirds were more abundant in the grasslands and riverbanks. What is the MOST LIKELY explanation for these events after the wolf was reintroduced?
The wolves began preying on the elk, and the beaver started using the trees to make lodges.
After the gray wolves came back to Yellowstone, the carrying capacity of the ecosystem increased
The wolves' reintroduction altered the limiting factors for the elk, the beavers, the trees, and the songbirds
The wolf's presence caused a decrease in the elk population, which allowed the riverside trees to grow more abundantly, which provided logs for the beavers' lodges and habitats for the songbirds
- 4. Multiple Choice
Which statement is the correct explanation of the function of macromolecules in carrying out a major function in the cell?
Lipids control the rate of cell reactions.
Carbohydrates form waterproof coverings.
Proteins are the main source of energy for the cell.
Nucleic acids store and transmit hereditary information.
- 5. Multiple Choice
Which explanation accurately describes how matter is transformed within the process of photosynthesis?
In the light reactions, carbohydrates release hydrogen atoms and form carbon dioxide. The hydrogen atoms join with oxygen to form water molecules in the Calvin cycle.
. In the Calvin cycle, carbohydrates release hydrogen atoms and form carbon dioxide. The hydrogen atoms join with oxygen to form water molecules in the light reactions
The hydrogen and oxygen atoms of water are split in the light reactions, and oxygen is released. In the Calvin cycle, hydrogen atoms join with the carbon and oxygen atoms of carbon dioxide to form carbohydrates
The hydrogen and oxygen atoms of water are split in the Calvin cycle, and oxygen is released. In the light reactions, hydrogen atoms join with the carbon and oxygen atoms of carbon dioxide to form carbohydrates.
- 6. Multiple Choice
Which argument provides evidence that BEST explains the interaction between an enzymatic protein and its substrate as a chemical reaction takes place?
The enzyme has a specific structure so that only one substrate can bind to it. As the enzyme and substrate come together, the shape of each perfectly complements the other.
The enzyme has a specific chemical composition so that only one substrate can bind to it. The chemicals in the enzyme and substrate cause them to be attracted to each other.
. The enzyme has a specific chemical composition so that only one substrate can bind to it. The chemicals in the enzyme cause the components of the substrate to be repelled from each other.
The enzyme has a specific structure so that only one substrate can bind to it. As the enzyme and substrate come together, the shape of the enzyme changes slightly so that it fits more snugly to the substrate.
- 7. Multiple Choice
Which statement BEST describes how embedded proteins help a plasma membrane perform its function?
They prevent waste material from leaving a cell.
They prevent water molecules from entering a cell.
They allow certain kinds of molecules to enter or leave a cell.
They allow substances dissolved in water to enter or leave a cell.
- 8. Multiple Choice
Sydney created a cell model for her science project as shown above. Sydney needs to label her model. Which statement BEST describes the type of model Sydney created?
Sydney has created a plant cell model because only plant cells contain chloroplasts and a cell wall.
Sydney has created an animal cell model because only animal cells contain a nucleus and a cell wall.
Sydney has created a plant cell model because only plant cells contain cytoplasm and a cell membrane.
Sydney has created an animal cell model because only animal cells contain chloroplasts and a cell membrane.
- 9. Multiple Choice
In a cell, the information that controls the production of proteins must pass from the nucleus to what other cell structure?
mitochondrion
cell membrane
chloroplast
ribosome
- 10. Multiple Choice
An environmental toxin is discovered that interferes with certain cellular functions. When affected cells are examined, it is observed that proteins are normally found in the plasma membrane are instead found in the cytoplasm. Other proteins are also located improperly. Which structure is most likely affected by the toxin?
Lysosomes
Mitochondria
Cell Wall
Golgi apparatus
- 11. Multiple Choice
Use the table above to answer the question. Which two students correctly described organic compounds in the table above?
Students 1 and 2
Students 2 and 3
Students 3 and 4
Students 2 and 4
- 12. Multiple Choice
Enzymes help living organisms metabolize food. Typically, an enzyme acts to
slow down a metabolic reaction, which prevents the organism from using energy too quickly.
maintain a metabolic reaction, which causes the organism to lose energy as it takes in food.
transform a metabolic reaction into an oxidation reaction, providing the organism with oxygen.
speed up a metabolic reaction, which allows the organism to get energy quickly.
- 13. Multiple Choice
The function of the nucleic acids contained in the body cells of an organism is
directing the synthesis of proteins necessary for proper cell function.
producing the inorganic molecules needed for normal cell growth.
disrupting meiosis and the synthesis of amino acids into a sequence.
forming a variety of gametes that will pass on hereditary information.
- 14. Multiple Choice
What is the role of carbohydrates in animal cells?
synthesizing proteins
developing enzymes
storing energy
protecting the cell wall
- 15. Multiple Choice
Which means of particle transport is shown in the figure above?
Osmosis
Diffusion
Facilitated diffusion
Active transport
- 16. Multiple Choice
A balloon allows water but not sugar to pass through it. The balloon contains a 10% sugar solution. A beaker contains a 5% sugar solution. Which statement is true?
When placed in the beaker, the balloon will gain water by osmosis.
When placed in the beaker, the balloon will lose water by osmosis.
When placed in the beaker, the balloon will gain water by active transport.
When placed in the beaker, the balloon will lose water by active transport.
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