Binghamton university Exam 2 Bio 311
Test Questions Solved Correctly 2026
Updated.
Langmuir Trough - Answer -used an experiment w/ pressure and proposed that a cell
membrane could be a phospholipid bilayer (as opposed to monolayer)
-1917
Danielle and Davson - Answer first formal model of a cell membrane
-1935
-protein-phospholipid-protein sandwich with a polar pore lined w/ proteins
what is the significance of the J.D. Robertson model? - Answer -used TEM
-confirmed D/D model
-found OsO4 on the membrane
-suggested glycosylation
1960's/1970's 4 critical experiments...what were they? - Answer 1) Freeze fracture- Dan
Branton
2) Cell fusion
3) Cell patching/capping
4) FRAP
Freeze fracture by Dan Branton - Answer -he was the 1st developer of FF
-they used a RBC and FFed it and found mosaic of bumps
-discovered transmembrane proteins
fluid mosaic model - Answer A model that describes the structure of cell membranes. In this
model, a flexible layer made of lipid molecules is interspersed with large protein molecules that
act as channels through which other molecules enter and leave the cell.
FRAP using con a - Answer binds to carb groups
50% of proteins migrated
endoplasmic vs cytoplasmic - Answer endo cytoplasmic
outside inside
, glycosylated non glycosylated
RBC ghost - Answer inside out rbc
why are RBC's the best cell type - Answer plentiful
easy target
easy to seperate
membranes are simple
spectrin - Answer rbc dimer
binds to glycophorin
cytoskeleton proteins that line the intercellular part of the cell membrane.
fibrous tetramers
ankyrin - Answer binds to spectrin
asymetric distribution of phospholipids is apparent because? - Answer outer and inner
leaflets (lipid bilayers)
phosphoglycerides - Answer cytoplasmic leaflet
in cancer it's an endoplasmic leaflet
3 types of phospholipids - Answer phosphoglycerides, sphingolipids, cholesterol
flippase - Answer transmembrane lipid transporter fluorochromes
quenchers
enzyme that flips phospholipids from exoplasmic faces
sphingolipid/sphingomyelin - Answer main component of myelin
sterols - Answer steoid alchohols
3 kinds of plasma membrane proteins - Answer integral membrane proteins, lipid anchored
proteins, peripheral proteins
Test Questions Solved Correctly 2026
Updated.
Langmuir Trough - Answer -used an experiment w/ pressure and proposed that a cell
membrane could be a phospholipid bilayer (as opposed to monolayer)
-1917
Danielle and Davson - Answer first formal model of a cell membrane
-1935
-protein-phospholipid-protein sandwich with a polar pore lined w/ proteins
what is the significance of the J.D. Robertson model? - Answer -used TEM
-confirmed D/D model
-found OsO4 on the membrane
-suggested glycosylation
1960's/1970's 4 critical experiments...what were they? - Answer 1) Freeze fracture- Dan
Branton
2) Cell fusion
3) Cell patching/capping
4) FRAP
Freeze fracture by Dan Branton - Answer -he was the 1st developer of FF
-they used a RBC and FFed it and found mosaic of bumps
-discovered transmembrane proteins
fluid mosaic model - Answer A model that describes the structure of cell membranes. In this
model, a flexible layer made of lipid molecules is interspersed with large protein molecules that
act as channels through which other molecules enter and leave the cell.
FRAP using con a - Answer binds to carb groups
50% of proteins migrated
endoplasmic vs cytoplasmic - Answer endo cytoplasmic
outside inside
, glycosylated non glycosylated
RBC ghost - Answer inside out rbc
why are RBC's the best cell type - Answer plentiful
easy target
easy to seperate
membranes are simple
spectrin - Answer rbc dimer
binds to glycophorin
cytoskeleton proteins that line the intercellular part of the cell membrane.
fibrous tetramers
ankyrin - Answer binds to spectrin
asymetric distribution of phospholipids is apparent because? - Answer outer and inner
leaflets (lipid bilayers)
phosphoglycerides - Answer cytoplasmic leaflet
in cancer it's an endoplasmic leaflet
3 types of phospholipids - Answer phosphoglycerides, sphingolipids, cholesterol
flippase - Answer transmembrane lipid transporter fluorochromes
quenchers
enzyme that flips phospholipids from exoplasmic faces
sphingolipid/sphingomyelin - Answer main component of myelin
sterols - Answer steoid alchohols
3 kinds of plasma membrane proteins - Answer integral membrane proteins, lipid anchored
proteins, peripheral proteins
