Bio 1201 exam 2 gregg EXAM (LATEST
UPDATE 2026) COMPLETE EXAM
QUESTIONS AND ACCURATE ANSWERS
|ALREADY PASSED!!
transport proteins -CORRECTANSWER are responsible for controlling passage across
the membrane
fluid mosaic model -CORRECTANSWER The membrane is a mosaic of protein
molecules bobbing in a fluid bilayer of phospholipids
fatty acid tails -CORRECTANSWER nonpolar, hydrophobic
fatty acid heads -CORRECTANSWER hydrophilic, polar
periphial proteins -CORRECTANSWER bound to the surface of the membrane
integral proteins -CORRECTANSWER penetrate the hydrophobic core (ones that span
the membrane are transmembrane protiens
How do cells recognize each other? -CORRECTANSWER by binding to molecules,
often containing carbohydrates, on the extracellular surface of the plasma membrane
,Glycolipids -CORRECTANSWER Membrane carbohydrates that are covalently bonded
to lipids.
Hypdrophobic -CORRECTANSWER molecules such as hydrocarbons that can dissolve
in the lipid bilayer and pass through the membrane rapidly
Hydrophilic -CORRECTANSWER molecules that don't cross the membrane easily (ions
and polar molecules)
transport proteins -CORRECTANSWER allow passage of hydrophilic substances
across the membrane
carrier proteins -CORRECTANSWER bind to molecules and change shape to shuttle
them across the membrane
passive transport -CORRECTANSWER the diffusion of a substance across a
membrane with no energy investment
Diffusuion -CORRECTANSWER 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 -CORRECTANSWER substances diffuse from high
concentration----> low concentration
Osmosis -CORRECTANSWER Diffusion of water through a selectively permeable
membrane
Isotonic -CORRECTANSWER when the concentration of two solutions is the same (no
net movement)
Hypertonic -CORRECTANSWER cell losses water and shrivils
hypertonic -CORRECTANSWER cell gains water and expands
In a plant cell water moves in and out affecting the size of what? -CORRECTANSWER
central vacuole
facilitated diffusion -CORRECTANSWER the transport of substances through a cell
membrane along a concentration gradient with the aid of carrier proteins
ion channels -CORRECTANSWER channel proteins that transport ions
gated channels -CORRECTANSWER open or close in response to a stimulus
UPDATE 2026) COMPLETE EXAM
QUESTIONS AND ACCURATE ANSWERS
|ALREADY PASSED!!
transport proteins -CORRECTANSWER are responsible for controlling passage across
the membrane
fluid mosaic model -CORRECTANSWER The membrane is a mosaic of protein
molecules bobbing in a fluid bilayer of phospholipids
fatty acid tails -CORRECTANSWER nonpolar, hydrophobic
fatty acid heads -CORRECTANSWER hydrophilic, polar
periphial proteins -CORRECTANSWER bound to the surface of the membrane
integral proteins -CORRECTANSWER penetrate the hydrophobic core (ones that span
the membrane are transmembrane protiens
How do cells recognize each other? -CORRECTANSWER by binding to molecules,
often containing carbohydrates, on the extracellular surface of the plasma membrane
,Glycolipids -CORRECTANSWER Membrane carbohydrates that are covalently bonded
to lipids.
Hypdrophobic -CORRECTANSWER molecules such as hydrocarbons that can dissolve
in the lipid bilayer and pass through the membrane rapidly
Hydrophilic -CORRECTANSWER molecules that don't cross the membrane easily (ions
and polar molecules)
transport proteins -CORRECTANSWER allow passage of hydrophilic substances
across the membrane
carrier proteins -CORRECTANSWER bind to molecules and change shape to shuttle
them across the membrane
passive transport -CORRECTANSWER the diffusion of a substance across a
membrane with no energy investment
Diffusuion -CORRECTANSWER 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 -CORRECTANSWER substances diffuse from high
concentration----> low concentration
Osmosis -CORRECTANSWER Diffusion of water through a selectively permeable
membrane
Isotonic -CORRECTANSWER when the concentration of two solutions is the same (no
net movement)
Hypertonic -CORRECTANSWER cell losses water and shrivils
hypertonic -CORRECTANSWER cell gains water and expands
In a plant cell water moves in and out affecting the size of what? -CORRECTANSWER
central vacuole
facilitated diffusion -CORRECTANSWER the transport of substances through a cell
membrane along a concentration gradient with the aid of carrier proteins
ion channels -CORRECTANSWER channel proteins that transport ions
gated channels -CORRECTANSWER open or close in response to a stimulus
