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24 Cards in this Set

  • Front
  • Back
What are the five functions of biological membranes?
Define cell boundaries
Divide cells into compartments
Organize complex reaction sequences
Act in signal reception and transmission
Act in energy transformation
What major component is found in yeast cell plasma membranes?
Liposomes have an _______?
Aqueous cavity
There are ____ types of integral membrane proteins.
Type 1 Integral Proteins have the _______ end on the inside and the ________ end on the outside.
Carboxyl, Amino
Type 2 Integral Proteins have the _______ end on the inside and the ________ end on the outside.
Animo, Carboxyl
Type III integral membrane protiens has multiple _______ transmembrane proteins
Type IV integral membrane proteins has multiple _______ transmembrane proteins
Name 3 types of Beta-barrel structures.
Alpha-Hemolysin Toxin
The inner portion of Beta-barrels are __________
What are eight examples of membrane fusion?
Budding of vesicles from golgi complex
Fusion of endosome and lysosome
Viral Infection
Fusion of sperm and egg
Fusion of small vacuoles(plants)
Separation of two plasma membranes at cell division
Simple diffusion is for ___________ and travels ___________.
nonpolar compounds only, down a concentration gradient
Facilitated diffusion requires a ____________ and travels ____________.
protein, down an electrochemical gradient.
Primary Active transport requires ___________ and travels ______________.
ATP, against an electrochemical gradient.
Secondary active transport requires ___________ and it travels ____________ and is driven by ____________.
no ATP, against the electrochemical gradient, ions moving down its gradient.
Ion channels travel _________ and may be _________ or ________.
down an electrochemical gradient,gated by a ligand, ion
Ionophore-mediated ion transport sends ________ down an _________
ions, electrochemical gradient.
If C1 is > C2 (C=concentration) and molecules can travel across the membrane. The net flow of molecules will travel from ______ to ______ by means of _______.
C1,C2, diffusion.
If C1 is > C2 (C=concentration) and molecules can flow across the membrane, the system is ______ in equilibrium.
If C1 = C2 (C=concentration) and molecules can travel across the membrane. The system is at ________ and there is _____ net flow of molecules.
equilibrium, no
If Vm is > 0, then one of the sides is _______ charged than the other, thus there is a ______ flow of ions across the membrane.
more, net
At Vm = 0 the system is at ________ and there is ____ ___ flow of ions.
equilibrium, no net
FepA is used to transport ________.
Maltoporin is used to transport ________.