Bio 1 Warm-up Quiz #9
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Questions and Answers
- 1.
Which of these supports the cell theory as it is stated today?
- A.
New cells are produced by division of existing cells.
- B.
All organisms are composed of more than one cell.
- C.
Cells must contain a nucleus.
- D.
Not all cells are alive.
Correct Answer
A. New cells are produced by division of existing cells.Explanation
The statement "New cells are produced by division of existing cells" supports the cell theory as it is stated today. The cell theory states that all living organisms are composed of cells, cells are the basic unit of structure and function in living organisms, and new cells are produced by existing cells. This statement aligns with the idea that cells can only arise from pre-existing cells through cell division, which is a fundamental principle of the cell theory.Rate this question:
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- 2.
Cells are able to remove large amounts of material using __.
- A.
Endocytosis
- B.
Exocytosis
- C.
Phagocytosis
- D.
Osmosis
Correct Answer
B. ExocytosisExplanation
Exocytosis is the correct answer because it is a process by which cells can remove large amounts of material. During exocytosis, vesicles within the cell fuse with the plasma membrane and release their contents outside of the cell. This allows the cell to eliminate waste products, release hormones or neurotransmitters, and secrete substances such as enzymes or mucus.Rate this question:
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- 3.
What gives water many properties that are important to living things?
- A.
Temperature
- B.
Density
- C.
Hydrogen bonds
- D.
Specific heat
Correct Answer
C. Hydrogen bondsExplanation
Hydrogen bonds are responsible for giving water many properties that are important to living things. These bonds occur between the positively charged hydrogen atoms of one water molecule and the negatively charged oxygen atoms of neighboring water molecules. This results in water's high boiling point, surface tension, and cohesion, which are crucial for various biological processes such as maintaining stable body temperature, transporting nutrients, and supporting cell structure.Rate this question:
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- 4.
In the lock-and-key model of enzyme function shown in Figure 2.2, what is happening in step 2?
- A.
The catalyzed reaction is releasing a product.
- B.
The active sites are restructuring the enzyme.
- C.
The enzyme is creating bonds between the substrates.
- D.
The substrates are beginning to separate from each other.
Correct Answer
C. The enzyme is creating bonds between the substrates.Explanation
In step 2 of the lock-and-key model of enzyme function, the enzyme is creating bonds between the substrates. This means that the enzyme is facilitating the formation of chemical bonds between the substrates, which is a crucial step in the catalyzed reaction. This process allows the substrates to come together and react more easily, increasing the efficiency of the reaction.Rate this question:
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- 5.
What is the function of the structure shown in the diagram?
- A.
Make cytoplasm
- B.
Regulate what goes in/out of a cell
- C.
Manufacture lipids
- D.
Produce proteins
Correct Answer
B. Regulate what goes in/out of a cellExplanation
The structure shown in the diagram is likely a cell membrane. The cell membrane plays a crucial role in regulating what goes in and out of a cell. It acts as a barrier, controlling the movement of substances such as ions, nutrients, and waste products. This regulation ensures that the cell maintains its internal environment and allows for proper functioning.Rate this question:
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- 6.
When graphing experimental results, you should place the ______ onto the y axis.
- A.
Constant
- B.
Independent variable
- C.
Dependent variable
- D.
Bar
Correct Answer
C. Dependent variableExplanation
When graphing experimental results, the dependent variable should be placed on the y-axis. The dependent variable is the variable that is being measured or observed and is expected to change as a result of manipulating the independent variable. The y-axis represents the vertical axis on a graph and is used to plot the values of the dependent variable. By placing the dependent variable on the y-axis, we can visually represent the relationship between the independent variable and the dependent variable.Rate this question:
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- 7.
The structures labeled B would be made up of ___.
- A.
Cellulose
- B.
Lipid
- C.
Protein
- D.
Fatty acids
Correct Answer
C. ProteinExplanation
The structures labeled B would be made up of protein because protein is a macromolecule that is involved in various structural functions in living organisms. Proteins are made up of amino acids and can form complex structures such as enzymes, antibodies, and structural components of cells and tissues. Therefore, it is likely that the structures labeled B would be composed of protein.Rate this question:
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- 8.
Transport proteins play a role in both ___.
- A.
Passive and active transport.
- B.
Exocytosis and endocytosis.
- C.
Diffusion and vesicle transport.
- D.
Phagocytosis and passive transport.
Correct Answer
A. Passive and active transport.Explanation
Transport proteins are involved in both passive and active transport. Passive transport refers to the movement of molecules across a cell membrane without the use of energy, while active transport requires energy to move molecules against their concentration gradient. Transport proteins facilitate the movement of molecules across the cell membrane in both of these processes.Rate this question:
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- 9.
Scientists found that, over a period of 200 years, a mountain pond was transformed into a meadow. During that time, several communities of organisms were replaced by different communities. Which of these best explains why new communities were able to replace older communities?
- A.
The original species became extinct.
- B.
Species in the older community died from old age.
- C.
The abiotic characteristics of the habitat changed.
- D.
Diseases that killed the older organisms disappeared.
Correct Answer
C. The abiotic characteristics of the habitat changed.Explanation
The abiotic characteristics of the habitat changed. This explanation suggests that the transformation of the mountain pond into a meadow was likely due to changes in the non-living factors of the environment, such as temperature, soil composition, or water availability. These changes would have created a new set of conditions that favored the growth and survival of different organisms, leading to the replacement of the older communities with new ones.Rate this question:
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- 10.
During the last part of M phase in an animal cell, the ___ would begin developing.
- A.
Signs of decomposing
- B.
Spindle fibers
- C.
Cell plate
- D.
Cleavage furrow
Correct Answer
D. Cleavage furrowExplanation
During the last part of M phase in an animal cell, the cleavage furrow would begin developing. The cleavage furrow is a shallow groove that forms around the cell's equator during cytokinesis. It is responsible for dividing the cytoplasm into two daughter cells. This process is crucial for the completion of cell division and the formation of two genetically identical daughter cells. The other options, such as signs of decomposing, spindle fibers, and cell plate, are not associated with the last part of M phase in an animal cell.Rate this question:
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