Bio 2 Warm-up Quiz #3 (Fall 2014)
Bio 2 Warm-up Quiz #3 (Fall 2014) assesses foundational knowledge in cellular biology, focusing on differences between cell types, mechanisms of cellular transport, and enzymatic activity. It's designed to test understanding of cell theory and the functional roles of cellular structures.
- 1.
Unlike prokaryotic cells, eukaryotic cells have the capacity to
- A.
Assemble into multicellular organisms
- B.
Establish symbiotic relationships with other organisms
- C.
Obtain energy from the Sun
- D.
Store genetic information in the form of DNA
Correct Answer
A. Assemble into multicellular organismsExplanation
Eukaryotic cells have the ability to assemble into multicellular organisms because they are more complex and have specialized organelles that allow for cell differentiation and communication. This allows cells to come together and form tissues, organs, and ultimately multicellular organisms. Prokaryotic cells, on the other hand, lack these specialized structures and are typically single-celled organisms.Rate this question:
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- 2.
Under a microscope, a series of cells are observed that lack membrane bound internal organelles. Which of these is the most likely cell type?
- A.
Plant cell
- B.
Animal cell
- C.
Eukaryotic cell
- D.
Prokaryotic cell
Correct Answer
D. Prokaryotic cellExplanation
The most likely cell type in this scenario is a prokaryotic cell. Prokaryotic cells are characterized by their lack of membrane-bound organelles, such as a nucleus or mitochondria. They are typically found in bacteria and archaea. Plant and animal cells are examples of eukaryotic cells, which have membrane-bound organelles. Therefore, the absence of membrane-bound organelles suggests that the observed cells are prokaryotic.Rate this question:
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- 3.
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 from pre-existing cells. This statement aligns with the idea that new cells are formed through cell division, which is a fundamental process in the cell theory.Rate this question:
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- 4.
If energy is needed to move materials into or out of a cell, what is most likely occurring?
- A.
Osmosis
- B.
Active transport
- C.
Passive transport
- D.
Diffusion
Correct Answer
B. Active transportExplanation
Active transport is the most likely process occurring when energy is needed to move materials into or out of a cell. Unlike passive transport, which relies on the concentration gradient to move molecules across the cell membrane, active transport requires the use of energy (usually ATP) to move molecules against the concentration gradient. This process is essential for the cell to maintain homeostasis and control the movement of specific molecules in and out of the cell.Rate this question:
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- 5.
Which most directly controls the rate at which food is broken down to release energy?
- A.
Enzymes
- B.
Nucleic acids
- C.
Hormones
- D.
Vitamins
Correct Answer
A. EnzymesExplanation
Enzymes are proteins that act as catalysts in biochemical reactions. They speed up the rate at which food molecules are broken down into smaller molecules, such as glucose, to release energy. Enzymes achieve this by lowering the activation energy required for the reaction to occur. Without enzymes, the breakdown of food would be too slow to provide the necessary energy for cellular processes. Therefore, enzymes directly control the rate at which food is broken down to release energy.Rate this question:
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- 6.
Which function do structures X and Y have in common?
- A.
Digestion
- B.
Gathering Food
- C.
Movement
- D.
Reproduction
Correct Answer
C. MovementExplanation
Both structures X and Y have the function of movement in common. This means that both structures are involved in the ability to move or change position. Movement is an essential function for organisms to navigate their environment, find food, escape predators, and carry out other necessary activities for survival.Rate this question:
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- 7.
Which would be the best evidence that a cell is using active transport to move a substance across its cell membrane?
- A.
Substances are moving rapidly across the cell membrane.
- B.
ATP is being rapidly consumed near the cellular membrane.
- C.
Substances are moving from high to low concentrations.
- D.
Substances are moving through channels in the cell membrane.
Correct Answer
B. ATP is being rapidly consumed near the cellular membrane.Explanation
The best evidence that a cell is using active transport to move a substance across its cell membrane is the rapid consumption of ATP near the cellular membrane. Active transport requires energy in the form of ATP to move substances against their concentration gradient. The rapid consumption of ATP indicates that the cell is actively using energy to transport the substance across the membrane.Rate this question:
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- 8.
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 process by which cells remove large amounts of material. During exocytosis, vesicles containing waste materials or cellular products fuse with the cell membrane and release their contents outside the cell. This allows cells to eliminate excess substances, such as toxins or metabolic waste, or to secrete molecules like hormones or enzymes. Endocytosis is the opposite process, where cells take in materials from the external environment. Phagocytosis is a type of endocytosis specifically used to engulf and digest large particles or pathogens. Osmosis, on the other hand, is the movement of water across a semipermeable membrane to equalize solute concentrations.Rate this question:
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- 9.
Which type of transport is shown in the diagram?
- A.
Passive transport
- B.
Active transport
- C.
Osmosis
- D.
Endocytosis
Correct Answer
B. Active transportExplanation
The correct answer is Active transport. Active transport is a process in which molecules or ions move across a cell membrane against their concentration gradient, requiring the use of energy in the form of ATP. The diagram likely depicts a situation where molecules are being actively transported across the membrane, indicating the involvement of energy and the movement against the concentration gradient.Rate this question:
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- 10.
The difference in the concentration of dissolved particles from one location to another is called a ___.
- A.
Concentration gradient
- B.
Concentrated solution
- C.
Saline solution
- D.
Dynamic gradient
Correct Answer
A. Concentration gradientExplanation
A concentration gradient refers to the difference in the concentration of dissolved particles between two locations. It represents how the concentration of particles changes or varies from one area to another.Rate this question:
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Mar 20, 2023Quiz Edited by
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Oct 23, 2014Quiz Created by
Christopher Mack
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