This Advanced Science quiz for the 2nd Trimester of 2014-2015 focuses on key concepts of diffusion and osmosis. It tests understanding of molecular movement, cell membrane dynamics, and solution tonicity, enhancing comprehension of fundamental biological processes.
Selectively permeable
Permeable
Impermeable
Special barrier
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Salt damages the slug's cells.
A higher solute (salt) concentration on the outside of the slug creates a concentration gradient where water moves out of the slug rapidly, causing the slug's cells to rapidly dehydrate.
A higher solvent (water) concentration on the outside of the slug causes a concentration gradient when water moves into the slug rapidly, causing the slug's cells to burst.
Salt enters the slug's cells and pushes water out of the slug, causing it to dehydrate.
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Collisions stop occurring.
When two solutions become isotonic.
All of the molecules have moved from high to low concentration.
Molecules never stop moving. (Unless they reach absolute zero, and even this state is open to debate).
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False
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False
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Aquaporins
Apertures
Orofices
Water channels
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Water molecules that don't require energy to move across cell membranes.
Water molecules that are not bound to solutes (such as salt).
Water molecules that are bound to salt molecules.
Water molecules that are not connected to each other.
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False
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Because molecules have kinetic energy.
Because molecules have potential energy.
Because molecules are constantly colliding with each other.
Because they move randomly due to the laws of physics.
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True, because diffusion moves molecules from a high to low concentration.
False, because molecules cannot move across membranes by diffusion.
False, because diffusion moves molecules from a low to high concentration.
False, because molecules such as sugar are too large to move across cell membranes.
False, because energy is required for diffusion.
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Salt entered by osmosis from an area of high to lower concentration.
Gummy bears often eat sugar during the day and grow overnight.
A concentration gradient moved water from an area of low to higher concentration.
Water entered the bears by osmosis from an area of high to lower concentration.
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The cell will shrivel and possibly die due to loss of water by osmosis.
The cell will expand and possibly die due to the gain of water by osmosis.
The cell will shrivel and possibly die due to loss of salt by diffusion.
The cell will expand and possibly die due to the gain of salt by diffusion.
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False
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Water breaks down the green dye/pigment used to color the bear.
The green dye/pigment diffused from an area of high to an area of lower concentration.
As water moved into the bear, it pushed the green dye/pigment out.
Green gummy bears possess chlorophyll for photosynthesis... this chlorophyll breaks down rapidly in the presence of water.
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A.) Hypertonic
B.) Hypotonic
C.) Isotonic
D.) Dynamic equilibrium
Both "C" and "D' are correct
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