CHE 4342 FINAL EXAM QUESTIONS AND
100% CORRECT ANSWERS!!
There are how many potassium ions in the channel before another ions enters and one
leaves
2
Why are gap junctions are unique integral proteins because
they span two plasma membranes with a pore in the middle
Carrier ionophore
form complexes with ions and diffuse freely across lipid membrane. It looks like the complex
turns in the membrane to move the ion
channel forming ionophore
form a fixed structure pore in the membrane allowing free passage of ions
WHy can the potassium mobile carrier not bind Na+
it is too small
How does Gramicidin-A channel work
it dimerizes and folds as a right handed helix with pore in middle in lipid bilayer
Why is dimerizing in the ion channel important
so it can span the membrane
When looking at simple diffusion what is the relationship
, linear
The permeability of a molecule is proportional the molecules
hydrophobicity
Active transport coupled to _____ ATP hydrolysis
exergonic
P type ATPases
Undergo phosphorylation as they transport cations across membrane
A type ATPases
transport anions
F type ATPases
are H+ transporting complexes located in mitochondrial and bacterial membranes. they operate
in reverse to synthesize ATP
V type ATPases
resemble F type but occur in plant vacuoles and acidic vesicles
ABC transporters
ATP-binding cassette transport a variety of substances including ions small metabolites and drug
molecules, drug resistance
What kind of transport does the sodium potassium pump use
P type ATPase
100% CORRECT ANSWERS!!
There are how many potassium ions in the channel before another ions enters and one
leaves
2
Why are gap junctions are unique integral proteins because
they span two plasma membranes with a pore in the middle
Carrier ionophore
form complexes with ions and diffuse freely across lipid membrane. It looks like the complex
turns in the membrane to move the ion
channel forming ionophore
form a fixed structure pore in the membrane allowing free passage of ions
WHy can the potassium mobile carrier not bind Na+
it is too small
How does Gramicidin-A channel work
it dimerizes and folds as a right handed helix with pore in middle in lipid bilayer
Why is dimerizing in the ion channel important
so it can span the membrane
When looking at simple diffusion what is the relationship
, linear
The permeability of a molecule is proportional the molecules
hydrophobicity
Active transport coupled to _____ ATP hydrolysis
exergonic
P type ATPases
Undergo phosphorylation as they transport cations across membrane
A type ATPases
transport anions
F type ATPases
are H+ transporting complexes located in mitochondrial and bacterial membranes. they operate
in reverse to synthesize ATP
V type ATPases
resemble F type but occur in plant vacuoles and acidic vesicles
ABC transporters
ATP-binding cassette transport a variety of substances including ions small metabolites and drug
molecules, drug resistance
What kind of transport does the sodium potassium pump use
P type ATPase
