Cell Transport Test Review: Question Preview (ID: 18229)


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1) What is (are) the main difference(s) between passive transport and active transport?
a) Passive transport does not require any cellular proteins; active transport requires cellular proteins. b) Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not. c) Passive transport occurs primarily in single-cell organisms; active transport occurs primarily in multi-cellular organisms. d) Active transport works against gravity (for example, upwards from the roots of a tree); passive transport works with gravity
2) Which example(s) of cell tranposrt does not require chemcial energy?
a) Drops of blue food coloring are placed in water and spread throughout the water, turning it blue. b) A potato slice is placed in water and water molecules from inside the potato move into the surrouning water. c) both A and B d) neither A nor B
3) Endocytosis is an example of what type of transport?
a) osmosis b) facilitated diffusion c) passive transport d) active transport
4) All of the following are types of passive transport except
a) facilitated diffusion b) diffusion c) endocytosis d) osmosis
5) What is the role of ATP in the process of active transport?
a) It lengthens the fatty acid chains in the membrane. b) It provides the energy that cells need to move molecules against a concentration gradient. c) It weakens the membrane, allowing molecules to pass through more easily. d) It provides the energy to transport the cell in its environment.
6) Facilitated diffusion allows certain kinds of compounds that are normally blocked by the cell membrane to cross the cell membrane. All of the following are examples of compounds that move by facilitated diffusion except
a) glucose b) potassium c) sodium d) water
7) Exocytosis is an example of what type of transport?
a) active transport b) osmosis c) facilitated diffusion d) passive transport
8) Which of the following is an example of osmosis?
a) Intesintal cells use osmosis to absorb nutrients from food. b) A single-celled organism uses osmosis to take in food particles. c) A plant's roots use osmosis to absorb water from the soil. d) The human body uses osmosis to move antibodies out of cells.
9) How do substances move into or out of the cell through endocytosis?
a) Substances are engulfed by a cell's plasma membrane to form a channel into the cell. b) Substances are engulfed by a cell's plasma membrane and brought into the cell in a vesicle. c) Substances cross the cell membrane through protein channels. d) Substances are engulfed by a vesicle, which crosses the cell membrane.
10) What kind of material is transported through osmosis?
a) blood b) oxygen c) water d) nitrogen-fixing bacteria
11) In facilitated diffusion, what are the special channels that help substances cross the cell membrane made of?
a) proteins b) carbon bonds c) nucleic acids d) water molecules
12) Which statement is true regarding active transport?
a) Substances can only move into cells, not out of cells. b) Substances do not require additional energy to move in and out of cells. c) Substances can only move across the cell membrane if they are water soluble. d) Substances can move from areas of low concentration to areas of high concentration.
13) How does particle size affect a molecule's transport across a cell membrane?
a) Particle size is less important than particle shape for calculating transport speed. b) It is easier for small molecules to diffuse across the cell membrane. c) Particle size does not affect a molecule's transport speed across the cell membrane. d) It is easier for large molecules to diffuse across the cell membrane.
14) What causes the diffusion process to stop?
a) The concentration of materials inside and outside the cell becomes equal. b) The concentration of materials outside the cell becomes greater than the concentration of materials inside the cell. c) The concentration of materials cannot be changed because ATP is no longer available. d) The concentration of materials inside the cell becomes greater than the concentration of materials outside of the cell.
15) Suppose that you stayed in the bathtub too long, causing your hands and feet to look wrinkled. What kind of passive cell transport causes this effect?
a) diffusion b) exocytosis c) facilitated diffusion d) osmosis
16) Which best describes the role of endocytosis in cell transport?
a) Endocytosis moves substances into the cell. b) Endocytosis moves substances out of the cell. c) Endocytosis moves substances into or out of the cell, down a concentration gradient. d) Endocytosis moves substances into or out of the cell, against their concentration gradient.
17) In general, in what direction does a diffusing substance move?
a) in the opposite direction than it would normally move b) up its concentration gradient c) down its concentration gradient d) it depends on the substance being diffused
18) Which best describes the role of exocytosis in cell transport?
a) Exocytosis moves substances into the cell. b) Exocytosis moves substances out of the cell. c) Exocytosis moves substances into or out of the cell, against their concentration gradient. d) Exocytosis moves substances into or out of the cell, down a concentration gradient.
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