Campbell Biology in Focus (3rd Edition) - Chapter 005 Quiz
Bank Question & Answers 2023 GRADED A+
selective permeability correct answers A property of biological membranes that allows them to regulate
the passage of substances across them.
amphipathic correct answers Having both a hydrophilic region and a hydrophobic region.
fluid mosaic model correct answers The currently accepted model of cell membrane structure, which
envisions the membrane as a mosaic of protein molecules drifting laterally in a fluid bilayer of
phospholipids.
integral protein correct answers A transmembrane protein with hydrophobic regions that extend into
and often completely span the hydrophobic interior of the membrane and with hydrophilic regions in
contact with the aqueous solution on one or both sides of the membrane (or lining the channel in the
case of a channel protein).
peripheral protein correct answers A protein loosely bound to the surface of a membrane or to part of
an integral protein and not embedded in the lipid bilayer.
glycolipid correct answers A lipid with one or more covalently attached carbohydrates.
glycoprotein correct answers A protein with one or more covalently attached carbohydrates.
transport protein correct answers A transmembrane protein that helps a certain substance or class of
closely related substances to cross the membrane.
channel protein correct answers A type of transport protein that functions by having a hydrophilic
channel that certain molecules or atomic ions use as a tunnel through a membrane.
aquaporin correct answers A channel protein in the plasma membrane of a plant, animal, or
microorganism cell that specifically facilitates osmosis, the diffusion of free water across the membrane.
carrier protein correct answers A type of transport protein that holds onto its passengers and changes
shape in a way that shuttles them across a membrane.
diffusion correct answers The random thermal motion of particles of liquids, gases, or solids. In the
presence of a concentration or electrochemical gradient, diffusion results in the net movement of a
substance from a region where it is more concentrated to a region where it is less concentrated.
concentration gradient correct answers A region along which the density of a chemical substance
increases or decreases.
passive transport correct answers The diffusion of a substance across a biological membrane with no
expenditure of energy.
Bank Question & Answers 2023 GRADED A+
selective permeability correct answers A property of biological membranes that allows them to regulate
the passage of substances across them.
amphipathic correct answers Having both a hydrophilic region and a hydrophobic region.
fluid mosaic model correct answers The currently accepted model of cell membrane structure, which
envisions the membrane as a mosaic of protein molecules drifting laterally in a fluid bilayer of
phospholipids.
integral protein correct answers A transmembrane protein with hydrophobic regions that extend into
and often completely span the hydrophobic interior of the membrane and with hydrophilic regions in
contact with the aqueous solution on one or both sides of the membrane (or lining the channel in the
case of a channel protein).
peripheral protein correct answers A protein loosely bound to the surface of a membrane or to part of
an integral protein and not embedded in the lipid bilayer.
glycolipid correct answers A lipid with one or more covalently attached carbohydrates.
glycoprotein correct answers A protein with one or more covalently attached carbohydrates.
transport protein correct answers A transmembrane protein that helps a certain substance or class of
closely related substances to cross the membrane.
channel protein correct answers A type of transport protein that functions by having a hydrophilic
channel that certain molecules or atomic ions use as a tunnel through a membrane.
aquaporin correct answers A channel protein in the plasma membrane of a plant, animal, or
microorganism cell that specifically facilitates osmosis, the diffusion of free water across the membrane.
carrier protein correct answers A type of transport protein that holds onto its passengers and changes
shape in a way that shuttles them across a membrane.
diffusion correct answers The random thermal motion of particles of liquids, gases, or solids. In the
presence of a concentration or electrochemical gradient, diffusion results in the net movement of a
substance from a region where it is more concentrated to a region where it is less concentrated.
concentration gradient correct answers A region along which the density of a chemical substance
increases or decreases.
passive transport correct answers The diffusion of a substance across a biological membrane with no
expenditure of energy.
