Multiple Choice
Identify the choice that best completes the
statement or answers the question.
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1.
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Study the information below.  Two cells are separated by
semi-permeable membranes. The starch molecules cannot pass through the membranes, but the salt
molecules can pass through the membranes. Which statement describes the process for achieving
homeostasis between the cells? a. | Salt will move from 2 to 1 by diffusion. | b. | Salt will move form
1 to 2 by diffusion. | c. | Salt will move from 2 to 1 by
osmosis. | d. | Salt will move from 1 to 2 by osmosis. |
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2.
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Which statement describes the cellular conditions in which passive transport
would occur?
a. | Energy is used to move molecule from an area of low concentration to an area of high
concentration. | b. | Energy is used to move molecules from an area of high concentration to an area of low
concentration. | c. | There is a concentration gradient across a semi-permeable membrane where molecules
move from an area of low concentration to an area of high concentration. | d. | There is a
concentration gradient across a semi-permeable membrane where molecule move from an area of high
concentration to an area of low concentration. |
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3.
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Which statement describes a cell after it has been placed in a sugar
solution?
a. | It is larger because sugar entered the cell by diffusion. | b. | It is smaller
because water left the cell by osmosis. | c. | It is smaller because sugar left the cell by
diffusion. | d. | It is larger because water entered the cell by
osmosis. |
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4.
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Study the diagram below.   Which arrow show
the direction the solute molecule would move to achieve homeostasis?
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5.
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Study the diagram below:  A potato slice is placed in
distilled water in beaker 1. A similar potato slice is placed in salt water in beaker 2.
Which statement correctly explains the movement of water across cell membranes in one of the potato
slices? a. | Water will move out of the potato cells in beaker 2 because the solution is more
concentrated. | b. | Water will move into the potato cells in beaker 1 because the solution is more
concentrated. | c. | Water will move into the potatoe cells in beaker 2 because the solution is more
concentrated. | d. | Water will move out of the potato cells in beaker 1 because the solution is more
concentrated. |
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6.
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Molecules move from areas of low concentration to areas of high concentration
through the process of
a. | active transport | b. | passive transport | c. | diffusion | d. | osmosis |
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7.
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Study the figure below.  If they membrane show is
permeable to molecules of X, but impermeable to molecules of Y, what will be the result of diffusion
over time? a. | Molecules of X on each side of the membrane will become equal in
concentration. | b. | Molecules of Y on each side of the membrane will become equal in
concentration. | c. | Molecules of X will increase in concentration on the right side. | d. | Molecules of Y will
increase in concentration on the right side. |
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8.
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A single-celled paramecium is placed into a dish that contains distilled
water. Which statement describes the cell processes that allow the paramecium to achieve
homeostasis?
a. | Water leaves the cell by osmosis, and contractile vacuoles obtain water by active
transport. | b. | Water enters the cell by osmosis, and contractile vacuoles eliminate excess water by
diffusion. | c. | Water enters the cell by osmosis, and contractile vacuoles eliminate excess water by
active transport. | d. | Water leaves the cell by osmosis, and
contractile vacuoles obtain water by diffusion |
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