BIO 1201 EXAM 2 GREGG QUESTIONS
& VERIFIED ANSWERS PASSED 100%
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
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
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
In a plant cell water moves in and out affecting the size of what? - Correct Answer ✔✔
central vacuole
facilitated diffusion - Correct Answer ✔✔ the transport of substances through a cell
membrane along a concentration gradient with the aid of carrier proteins
ion channels - Correct Answer ✔✔ channel proteins that transport ions
gated channels - Correct Answer ✔✔ open or close in response to a stimulus
active transport - Correct Answer ✔✔ requires energy (ATP) to move substances
against their concentration gradient
cotransport - Correct Answer ✔✔ coupled transport by a membrane protein
transport proteins - Correct Answer ✔✔ small molecules leave through the lipid bilayer
via___________?
Phagocytosis - Correct Answer ✔✔ Cell eating
Pinocytosis - Correct Answer ✔✔ Cell drinking
hydrophilic tails - Correct Answer ✔✔ If a plasma membrane were compared to a
sandwich, __________ would be considered the filling
Metabolism - Correct Answer ✔✔ All of the chemical reactions that occur within an
organism
active transport - Correct Answer ✔✔ cytoplasm of cell has a higher concentration of k+
ions. How will K+ ions enter the cell?
metabolic pathway - Correct Answer ✔✔ Begins with a specific molecule, which is then
altered in a series of defined steps, resulting in a certain product.
& VERIFIED ANSWERS PASSED 100%
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
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
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
In a plant cell water moves in and out affecting the size of what? - Correct Answer ✔✔
central vacuole
facilitated diffusion - Correct Answer ✔✔ the transport of substances through a cell
membrane along a concentration gradient with the aid of carrier proteins
ion channels - Correct Answer ✔✔ channel proteins that transport ions
gated channels - Correct Answer ✔✔ open or close in response to a stimulus
active transport - Correct Answer ✔✔ requires energy (ATP) to move substances
against their concentration gradient
cotransport - Correct Answer ✔✔ coupled transport by a membrane protein
transport proteins - Correct Answer ✔✔ small molecules leave through the lipid bilayer
via___________?
Phagocytosis - Correct Answer ✔✔ Cell eating
Pinocytosis - Correct Answer ✔✔ Cell drinking
hydrophilic tails - Correct Answer ✔✔ If a plasma membrane were compared to a
sandwich, __________ would be considered the filling
Metabolism - Correct Answer ✔✔ All of the chemical reactions that occur within an
organism
active transport - Correct Answer ✔✔ cytoplasm of cell has a higher concentration of k+
ions. How will K+ ions enter the cell?
metabolic pathway - Correct Answer ✔✔ Begins with a specific molecule, which is then
altered in a series of defined steps, resulting in a certain product.
