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- 1. Multiple Choice
A scientist observes a single-celled organism with several long, whip-like tails. Which function do the whip-like tails most likely perform for the organism?
defense against predators
movement through an environment
detection of the location of a light source
measurement of atmospheric temperature changes
- 2. Multiple Choice
Trees are typically able to transport water from their roots to their stems and leaves. Which statement describes the property of water that most supports the transportation of water to all parts of a tree?
Water forms a crystalline structure when it freezes.
Water dissolves fewer substances than any other liquid.
Water has strong attractions to itself and many other molecules.
Water can absorb large amounts of energy with minimal temperature changes.
- 3. Multiple Choice
Which process best describes the assembly of proteins from amino acids?
Atoms are linked to form a compound.
Monomers are linked to form a polymer.
Atoms are added to a monomer until it becomes a polymer.
Molecules are added to a compound until it becomes a monomer.
- 4. Multiple Choice
Which biological molecules are most likely represented by molecules 1 and 2?
molecule 1: lipid
molecule 2: nucleic acid
molecule 1: lipid
molecule 2: protein
molecule 1: carbohydrate
molecule 2: nucleic acid
molecule 1: carbohydrate
molecule 2: protein
- 5. Multiple Choice
Which statement best describes a relationship between enzymes and a simple biological reaction?
Enzymes will increase the amount of substrate formed during a biological reaction.
Enzymes will decrease the amount of substrate formed during a biological reaction.
A reaction rate can be increased when the specific enzyme for a biological reaction is present.
A reaction rate can be decreased when multiple enzymes for a biological reaction are present.
- 6. Multiple Choice
Microbes in the digestive system break down food, which allows nutrients to be absorbed by the body's cells. How will these body cells most likely be affected in an individual suffers from a high fever?
The body cells will swell because an increase in temperature promotes greater water absorption.
The body cells will stop absorbing nutrients because the heat melts the lipid bilayer of the plasma membrane.
The body cells will shrivel because the heat eliminates the chemical gradients on either side of the plasma membrane.
The body cells will bring in fewer nutrient molecules because the transport proteins lose their proper shape due to the high temperature.
- 7. Multiple Choice
Four students classified the main energy conversions that occur during photosynthesis and cellular respiration. Which student best classified the energy conversions that occur in the two processes.
Student 1
Student 2
Student 3
Student 4
- 8. Multiple Choice
A scientist observed that during the course of a chemical reaction the number of ATP molecules was reduced. What did the scientist most likely learn from the observation?
The reaction produced water.
The reaction consumed water.
The reaction caused an output of energy.
The reaction required an input of energy.
- 9. Multiple Choice
Which of the following is most involved in providing structure for a plasma membrane?
the number of protein channels embedded in the membrane
the types of carbohydrates attached to proteins on the surface
the types of proteins that are attached to the surface of the membrane
the arrangement of the hydrophobic and hydrophilic ends of the phospholipids
- 10. Multiple Choice
What cell process is best modeled by the diagram?
osmosis
exocytosis
passive transport
facilitated diffusion
- 11. Multiple Choice
The shivering mechanism in bumblebees often serves the same purpose that it does in mammals. During which condition will the action of shivering most help a bumblebee to maintain homeostasis?
decrease in available oxygen
low environmental temperature
uncontrolled rise in core temperature
depletion of oxygen in muscle tissues
- 12. Multiple Choice
A cell in the leaf of a green plant performs both photosynthesis and cellular respiration, often at the same time. Which statement best describes how these processes are related to each other?
Both processes produce carbon dioxide.
Both processes require energy directly from the sun.
Products of one process are used as some of the reactants for the other process.
Thermal energy from one process is used as the energy source for the other process.
- 13. Multiple Choice
Which statement best describes how channel and carrier proteins in the plasma membrane are similar?
Both allow for the flow of molecules into and out of a cell.
Both directly connect the membrane to the nucleus of a cell.
Both use energy to continuously move water molecules out of a cell.
Both cause the phospholipid bilayer to form a rigid membrane for a cell.
- 14. Multiple Choice
Most prokaryotes and eukaryotes maintain a reserve of ATP. Which feature of prokaryotes and eukaryotes makes the ATP reserve necessary?
They have a cell membrane.
They can change over time.
They use energy to function.
They have the ability to reproduce.
- 15. Multiple Choice
The golgi apparatus is broken down during mitosis and then reformed. Which function would a cell be unable to perform during the time that its Golgi apparatus is broken down?
copying genetic material to include in the new cell
forming vesicles to import molecules into the cell
processing and packaging proteins for the cellular export
correcting errors in the process of building a new cell
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