BIOL 212 EXAM 1 PRACTICE QUESTIONS WITH
DETAILED EXPLANATIONS 2026
◉ If there is a concentration gradient of glucose across a membrane,
Answer: The glucose molecules are more numerous on one side of
the membrane than on the other.
◉ If equal volumes of differently colored solutions are poured into
opposite sides of a shallow pool of water, what will be the result at
equilibrium.
Answer: The solutions will be uniformly distributed throughout the
pool.
◉ If a hospital patient is mistakenly given an IV of pure water
instead of a saline solution that is isotonic to blood, the patient's red
blood cells will.
Answer: absorb water from the plasma and eventually burst.
◉ The sodium‒potassium pump found in animal cells is a(n).
Answer: antiporter
,◉ For each molecule of ATP consumed during active transport of
sodium and potassium, there is an import of _______ ion(s) and an
export of _______ ion(s).
Answer: two K+; three Na+
◉ In a biological membrane, the phospholipids are arranged in a
_______, with the _______..
Answer: bilayer; fatty acids pointing toward each other
◉ If a cell membrane lacking integral proteins is prepared by freeze
fracture and examined under the electron microscope, the exposed
interior of the membrane bilayer will.
Answer: look smooth.
◉ The hydrophilic regions of a membrane protein would most likely
be found exposed on.
Answer: the surface of the membrane.
◉ The LDL receptor is an integral membrane protein that extends
both outside and into the interior of the cell. The amino acid side
chains (R groups) in the region of the protein that crosses the
membrane are most likely.
Answer: hydrophobic
, ◉ Which type of membrane protein would likely be removed most
easily from a cell membrane in a laboratory experiment? Peripheral
proteins.
Answer: Peripheral proteins
◉ The compounds in a biological membrane that form a barrier to
the movement of hydrophilic materials across the membrane are
lipids.
Answer: lipids
◉ The sodium‒potassium pump changes shape in response to the
hydrolysis of ATP and phosphorylation
If the hydrophilic side chains of a transmembrane protein were
removed, the protein would most likely.
Answer: remain with the phospholipid bilayer
◉ Equilibrium in a solution is the endpoint of diffusion.
Answer: the endpoint of diffusion
◉ Hypotonic.
Answer: when comparing two solutions, the solution with the lesser
concentration of solutes
◉ Isotonic.
DETAILED EXPLANATIONS 2026
◉ If there is a concentration gradient of glucose across a membrane,
Answer: The glucose molecules are more numerous on one side of
the membrane than on the other.
◉ If equal volumes of differently colored solutions are poured into
opposite sides of a shallow pool of water, what will be the result at
equilibrium.
Answer: The solutions will be uniformly distributed throughout the
pool.
◉ If a hospital patient is mistakenly given an IV of pure water
instead of a saline solution that is isotonic to blood, the patient's red
blood cells will.
Answer: absorb water from the plasma and eventually burst.
◉ The sodium‒potassium pump found in animal cells is a(n).
Answer: antiporter
,◉ For each molecule of ATP consumed during active transport of
sodium and potassium, there is an import of _______ ion(s) and an
export of _______ ion(s).
Answer: two K+; three Na+
◉ In a biological membrane, the phospholipids are arranged in a
_______, with the _______..
Answer: bilayer; fatty acids pointing toward each other
◉ If a cell membrane lacking integral proteins is prepared by freeze
fracture and examined under the electron microscope, the exposed
interior of the membrane bilayer will.
Answer: look smooth.
◉ The hydrophilic regions of a membrane protein would most likely
be found exposed on.
Answer: the surface of the membrane.
◉ The LDL receptor is an integral membrane protein that extends
both outside and into the interior of the cell. The amino acid side
chains (R groups) in the region of the protein that crosses the
membrane are most likely.
Answer: hydrophobic
, ◉ Which type of membrane protein would likely be removed most
easily from a cell membrane in a laboratory experiment? Peripheral
proteins.
Answer: Peripheral proteins
◉ The compounds in a biological membrane that form a barrier to
the movement of hydrophilic materials across the membrane are
lipids.
Answer: lipids
◉ The sodium‒potassium pump changes shape in response to the
hydrolysis of ATP and phosphorylation
If the hydrophilic side chains of a transmembrane protein were
removed, the protein would most likely.
Answer: remain with the phospholipid bilayer
◉ Equilibrium in a solution is the endpoint of diffusion.
Answer: the endpoint of diffusion
◉ Hypotonic.
Answer: when comparing two solutions, the solution with the lesser
concentration of solutes
◉ Isotonic.
