Lecture 2 ep transport Flashcards
whic of following isnt a smalle uncharge polar molecule h20 urea glucose CO2
Glucose-
tf hydrophobic moles and ions can cross the lipid bilayer
f only phobic molecule ions are imperm and need channels and carriers
Tf glycerol can cross the Lipid bilayer
T it is a small uncharged polar mol
Carrier Contain tyr group ser group tryptophan group
tyr group
Selectivity filter of Carrier contains a K ion selects one type of ion depends on charge and distance b/n groups 2 and 3
2 and 3
tf carrier is only assessible from 1 side
f from both side
Net flux of ion channels downhill requires nrg influenced only by conc.
downhill influenced by conc and change in e- potential
tf carriers dont require a conformation change
F
Carriers dont get saturated Jmax occurs at km Jmax occurs when you have saturation km occurs at 1/2 jmxas
3 and 4
movement in carriers is from
high to low conc net flux = 0 when conc are same
tf in carriers conf. change occurs after dissociation
f binding conc. change dissociation
active transport affinity are different conc are same on both side affinity are same 2 and 3
2 and 3
ex of active transport
p type atpase
tf na/k atpase and h/k atpase both transport k into cell
T
Ca atpase move Ca out move Ca in moves Ca out and H in
moves Ca out
