Test Bank Complete_ Lehninger Principles of
Biochemistry 8th Edition, (2021) David Nelson
(Author), Michael Cox (Author) All Chapters 1-28 | A+
Complete Solutions 2024
ligand-gated ion channel - ANSWERis a membrane protein that permits an ion to
pass through the membrane only when opened by the appropriate ligand.
Glucose transport into erythrocytes - ANSWERis an example of passive transport.
ΔGt - ANSWERwill have a negative sign when a monovalent cation is being imported
into a cell in the absence of a concentration gradient.
fluidity of lipid side chains - ANSWERis generally increased by an increase in the
number of double bonds in fatty acids.
choline-containing lipids - ANSWERare typically found in the outer leaflet of plasma
membranes, including sphingomyelin and phosphatidylcholine.
fatty acid composition in skin cells vs internal organs - ANSWERis different because
the internal organs function at a slightly higher temperature, leading to higher levels
of 18:2 relative to 18:0 in skin cells.
membrane fusion processes - ANSWERentry of glucose into cells does NOT involve
the fusion of two membranes or two regions of the same membrane.
transporter for lipids - ANSWERa flippase moves lipids from the outer leaflet to the
cytosolic leaflet of a plasma membrane.
membrane transport using ion gradients - ANSWERis secondary active transport.
free-energy change for K+ transport - ANSWERis about 15 kJ/mol when transporting
K+ from blood into an erythrocyte.
lipid to protein ratio in E. coli - ANSWERis about 200 molecules of membrane lipid for
each molecule of protein.
general feature of lipid bilayer - ANSWERIndividual lipid molecules are free to diffuse
laterally on the surface of the bilayer.
true statement about membranes - ANSWERSterol lipids are common in human cell
plasma membranes.
, bacterial cells adaptation - ANSWERincrease the synthesis of short-chain fatty acids
and decreasing the saturation of their membrane lipids to adapt to growth at lower
temperatures.
free-energy change for glucose uptake - ANSWERis about -10 kJ/mol when glucose
concentrations are 5 mM on the outside and 0.1 mM on the inside.
FRAP experiments - ANSWERare generally used in membrane studies to examine
transverse diffusion rates.
active transport rates - ANSWERRates at which substances are moved across a
membrane against their concentration gradient.
lateral diffusion rates - ANSWERRates at which molecules move within the same
layer of a membrane.
transverse diffusion rates - ANSWERRates at which molecules move from one layer
of a membrane to another.
neurotransmitter release - ANSWERThe process by which neurotransmitters are
released from a neuron into the synaptic cleft.
fusion pore - ANSWERA temporary opening that forms during the fusion of two
membranes.
SERCA pump - ANSWERA calcium pump that transports Ca2+ ions into the
sarcoplasmic reticulum.
integrins - ANSWERMembrane proteins that mediate cell adhesion.
amphitropic protein - ANSWERProteins that are reversibly membrane-associated or
cytosolic.
primary active uniporter - ANSWERA transport protein that moves a single type of
ion against its concentration gradient using ATP.
positive-inside rule - ANSWERIntegral plasma membrane proteins commonly have
positively charged amino acids on the cytosolic side.
constant Kt - ANSWERAnalogous to Km for an enzyme-catalyzed reaction in solute
transport.
facilitated diffusion - ANSWERTransport of solutes across a membrane via specific
proteins without energy input.
integral membrane proteins - ANSWERProteins that span the membrane and are
involved in various functions including transport.
Biochemistry 8th Edition, (2021) David Nelson
(Author), Michael Cox (Author) All Chapters 1-28 | A+
Complete Solutions 2024
ligand-gated ion channel - ANSWERis a membrane protein that permits an ion to
pass through the membrane only when opened by the appropriate ligand.
Glucose transport into erythrocytes - ANSWERis an example of passive transport.
ΔGt - ANSWERwill have a negative sign when a monovalent cation is being imported
into a cell in the absence of a concentration gradient.
fluidity of lipid side chains - ANSWERis generally increased by an increase in the
number of double bonds in fatty acids.
choline-containing lipids - ANSWERare typically found in the outer leaflet of plasma
membranes, including sphingomyelin and phosphatidylcholine.
fatty acid composition in skin cells vs internal organs - ANSWERis different because
the internal organs function at a slightly higher temperature, leading to higher levels
of 18:2 relative to 18:0 in skin cells.
membrane fusion processes - ANSWERentry of glucose into cells does NOT involve
the fusion of two membranes or two regions of the same membrane.
transporter for lipids - ANSWERa flippase moves lipids from the outer leaflet to the
cytosolic leaflet of a plasma membrane.
membrane transport using ion gradients - ANSWERis secondary active transport.
free-energy change for K+ transport - ANSWERis about 15 kJ/mol when transporting
K+ from blood into an erythrocyte.
lipid to protein ratio in E. coli - ANSWERis about 200 molecules of membrane lipid for
each molecule of protein.
general feature of lipid bilayer - ANSWERIndividual lipid molecules are free to diffuse
laterally on the surface of the bilayer.
true statement about membranes - ANSWERSterol lipids are common in human cell
plasma membranes.
, bacterial cells adaptation - ANSWERincrease the synthesis of short-chain fatty acids
and decreasing the saturation of their membrane lipids to adapt to growth at lower
temperatures.
free-energy change for glucose uptake - ANSWERis about -10 kJ/mol when glucose
concentrations are 5 mM on the outside and 0.1 mM on the inside.
FRAP experiments - ANSWERare generally used in membrane studies to examine
transverse diffusion rates.
active transport rates - ANSWERRates at which substances are moved across a
membrane against their concentration gradient.
lateral diffusion rates - ANSWERRates at which molecules move within the same
layer of a membrane.
transverse diffusion rates - ANSWERRates at which molecules move from one layer
of a membrane to another.
neurotransmitter release - ANSWERThe process by which neurotransmitters are
released from a neuron into the synaptic cleft.
fusion pore - ANSWERA temporary opening that forms during the fusion of two
membranes.
SERCA pump - ANSWERA calcium pump that transports Ca2+ ions into the
sarcoplasmic reticulum.
integrins - ANSWERMembrane proteins that mediate cell adhesion.
amphitropic protein - ANSWERProteins that are reversibly membrane-associated or
cytosolic.
primary active uniporter - ANSWERA transport protein that moves a single type of
ion against its concentration gradient using ATP.
positive-inside rule - ANSWERIntegral plasma membrane proteins commonly have
positively charged amino acids on the cytosolic side.
constant Kt - ANSWERAnalogous to Km for an enzyme-catalyzed reaction in solute
transport.
facilitated diffusion - ANSWERTransport of solutes across a membrane via specific
proteins without energy input.
integral membrane proteins - ANSWERProteins that span the membrane and are
involved in various functions including transport.
