1|Page
BIO 1201 EXAM 2 GREGG EXAM (LATEST VERSION
VERIFIED FOR ACCURACY) FULLY SOLVED & UPDATED
2026-2027(QUESTIONS + ANSWERS) SOLVED 100%
CORRECT!!
transport proteins ......ANSWER......are responsible for controlling
passage across the membrane
fluid mosaic model ......ANSWER......The membrane is a mosaic of
protein molecules bobbing in a fluid bilayer of phospholipids
fatty acid tails ......ANSWER......nonpolar, hydrophobic
fatty acid heads ......ANSWER......hydrophilic, polar
periphial proteins ......ANSWER......bound to the surface of the
membrane
integral proteins ......ANSWER......penetrate the hydrophobic core (ones
that span the membrane are transmembrane protiens
How do cells recognize each other? ......ANSWER......by binding to
molecules, often containing carbohydrates, on the extracellular surface
of the plasma membrane
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Glycolipids ......ANSWER......Membrane carbohydrates that are
covalently bonded to lipids.
Hypdrophobic ......ANSWER......molecules such as hydrocarbons that can
dissolve in the lipid bilayer and pass through the membrane rapidly
Hydrophilic ......ANSWER......molecules that don't cross the membrane
easily (ions and polar molecules)
transport proteins ......ANSWER......allow passage of hydrophilic
substances across the membrane
carrier proteins ......ANSWER......bind to molecules and change shape to
shuttle them across the membrane
passive transport ......ANSWER......the diffusion of a substance across a
membrane with no energy investment
Diffusuion ......ANSWER......Spreading out of particles away from each
other, from an area of high concentration to an area of low
concentration. (move to where space is available)
concentation gradient ......ANSWER......substances diffuse from high
concentration----> low concentration
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Osmosis ......ANSWER......Diffusion of water through a selectively
permeable membrane
Isotonic ......ANSWER......when the concentration of two solutions is the
same (no net movement)
Hypertonic ......ANSWER......cell losses water and shrivils
hypertonic ......ANSWER......cell gains water and expands
In a plant cell water moves in and out affecting the size of what?
......ANSWER......central vacuole
facilitated diffusion ......ANSWER......the transport of substances through
a cell membrane along a concentration gradient with the aid of carrier
proteins
ion channels ......ANSWER......channel proteins that transport ions
gated channels ......ANSWER......open or close in response to a stimulus
active transport ......ANSWER......requires energy (ATP) to move
substances against their concentration gradient
BIO 1201 EXAM 2 GREGG EXAM (LATEST VERSION
VERIFIED FOR ACCURACY) FULLY SOLVED & UPDATED
2026-2027(QUESTIONS + ANSWERS) SOLVED 100%
CORRECT!!
transport proteins ......ANSWER......are responsible for controlling
passage across the membrane
fluid mosaic model ......ANSWER......The membrane is a mosaic of
protein molecules bobbing in a fluid bilayer of phospholipids
fatty acid tails ......ANSWER......nonpolar, hydrophobic
fatty acid heads ......ANSWER......hydrophilic, polar
periphial proteins ......ANSWER......bound to the surface of the
membrane
integral proteins ......ANSWER......penetrate the hydrophobic core (ones
that span the membrane are transmembrane protiens
How do cells recognize each other? ......ANSWER......by binding to
molecules, often containing carbohydrates, on the extracellular surface
of the plasma membrane
,2|Page
Glycolipids ......ANSWER......Membrane carbohydrates that are
covalently bonded to lipids.
Hypdrophobic ......ANSWER......molecules such as hydrocarbons that can
dissolve in the lipid bilayer and pass through the membrane rapidly
Hydrophilic ......ANSWER......molecules that don't cross the membrane
easily (ions and polar molecules)
transport proteins ......ANSWER......allow passage of hydrophilic
substances across the membrane
carrier proteins ......ANSWER......bind to molecules and change shape to
shuttle them across the membrane
passive transport ......ANSWER......the diffusion of a substance across a
membrane with no energy investment
Diffusuion ......ANSWER......Spreading out of particles away from each
other, from an area of high concentration to an area of low
concentration. (move to where space is available)
concentation gradient ......ANSWER......substances diffuse from high
concentration----> low concentration
, 3|Page
Osmosis ......ANSWER......Diffusion of water through a selectively
permeable membrane
Isotonic ......ANSWER......when the concentration of two solutions is the
same (no net movement)
Hypertonic ......ANSWER......cell losses water and shrivils
hypertonic ......ANSWER......cell gains water and expands
In a plant cell water moves in and out affecting the size of what?
......ANSWER......central vacuole
facilitated diffusion ......ANSWER......the transport of substances through
a cell membrane along a concentration gradient with the aid of carrier
proteins
ion channels ......ANSWER......channel proteins that transport ions
gated channels ......ANSWER......open or close in response to a stimulus
active transport ......ANSWER......requires energy (ATP) to move
substances against their concentration gradient
