Final Exam 2 -gregg Bio 1201 Test
Questions and All Correct Answers
2025-2026 Updated.
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
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
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
cotransport - Answer coupled transport by a membrane protein
transport proteins - Answer small molecules leave through the lipid bilayer via___________?
Phagocytosis - Answer Cell eating
Pinocytosis - Answer Cell drinking
hydrophilic tails - Answer If a plasma membrane were compared to a sandwich, __________
would be considered the filling
Questions and All Correct Answers
2025-2026 Updated.
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
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
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
cotransport - Answer coupled transport by a membrane protein
transport proteins - Answer small molecules leave through the lipid bilayer via___________?
Phagocytosis - Answer Cell eating
Pinocytosis - Answer Cell drinking
hydrophilic tails - Answer If a plasma membrane were compared to a sandwich, __________
would be considered the filling
