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BIO 1201 GREGG EXAM 2 2025 UPDATED
ACTUAL EXAM WITH CORRECT SOLUTIONS.
transport proteins - correct answer- are responsible for
controlling passage across the membrane
fluid mosaic model - correct answer- The membrane is a
mosaic of protein molecules bobbing in a fluid bilayer of
phospholipids
fatty acid tails - correct answer- nonpolar, hydrophobic
fatty acid heads - correct answer- hydrophilic, polar
periphial proteins - correct answer- bound to the surface of the
membrane
integral proteins - correct answer- penetrate the hydrophobic
core (ones that span the membrane are transmembrane
protiens
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How do cells recognize each other? - correct answer- by
binding to molecules, often containing carbohydrates, on the
extracellular surface of the plasma membrane
Glycolipids - correct answer- Membrane carbohydrates that are
covalently bonded to lipids.
Hypdrophobic - correct answer- molecules such as
hydrocarbons that can dissolve in the lipid bilayer and pass
through the membrane rapidly
Hydrophilic - correct answer- molecules that don't cross the
membrane easily (ions and polar molecules)
transport proteins - correct answer- allow passage of
hydrophilic substances across the membrane
carrier proteins - correct answer- bind to molecules and change
shape to shuttle them across the membrane
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passive transport - correct answer- the diffusion of a substance
across a membrane with no energy investment
Diffusuion - correct 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 - correct answer- substances diffuse from
high concentration----> low concentration
Osmosis - correct answer- Diffusion of water through a
selectively permeable membrane
Isotonic - correct answer- when the concentration of two
solutions is the same (no net movement)
Hypertonic - correct answer- cell losses water and shrivils
hypertonic - correct answer- cell gains water and expands
BIO 1201 GREGG EXAM 2 2025 UPDATED
ACTUAL EXAM WITH CORRECT SOLUTIONS.
transport proteins - correct answer- are responsible for
controlling passage across the membrane
fluid mosaic model - correct answer- The membrane is a
mosaic of protein molecules bobbing in a fluid bilayer of
phospholipids
fatty acid tails - correct answer- nonpolar, hydrophobic
fatty acid heads - correct answer- hydrophilic, polar
periphial proteins - correct answer- bound to the surface of the
membrane
integral proteins - correct answer- penetrate the hydrophobic
core (ones that span the membrane are transmembrane
protiens
,2 | Page
How do cells recognize each other? - correct answer- by
binding to molecules, often containing carbohydrates, on the
extracellular surface of the plasma membrane
Glycolipids - correct answer- Membrane carbohydrates that are
covalently bonded to lipids.
Hypdrophobic - correct answer- molecules such as
hydrocarbons that can dissolve in the lipid bilayer and pass
through the membrane rapidly
Hydrophilic - correct answer- molecules that don't cross the
membrane easily (ions and polar molecules)
transport proteins - correct answer- allow passage of
hydrophilic substances across the membrane
carrier proteins - correct answer- bind to molecules and change
shape to shuttle them across the membrane
, 3 | Page
passive transport - correct answer- the diffusion of a substance
across a membrane with no energy investment
Diffusuion - correct 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 - correct answer- substances diffuse from
high concentration----> low concentration
Osmosis - correct answer- Diffusion of water through a
selectively permeable membrane
Isotonic - correct answer- when the concentration of two
solutions is the same (no net movement)
Hypertonic - correct answer- cell losses water and shrivils
hypertonic - correct answer- cell gains water and expands
