cell membrane evidence- lqc 2b Flashcards
what evidence does the Gorter and Grendel experiment show
Red blood cell membranes contain enough phospholipids to cover the red blood cell twice
what feature of the cell membrane fluid mosaic model which is supported by the evidence in the experiment by Gorter and Grendel
The cell membrane is a phospholipid bilayer
what evidence does the Davson and Danielli experiment show
Electron microscope images showed more detailed images of the cell membrane.
what feature of the cell membrane fluid mosaic model which is supported by the evidence in the experiment by Davson and Danielli
Different layers could be seen in the cell membrane – dark outer layers (thought to be protein) and a lighter inner layer (thought to be lipid)
what evidence does the freeze fracture experiment show
Freeze fracture showed ‘bumps’ in the centre of the membrane
what feature of the cell membrane fluid mosaic model which is supported by the evidence in the freeze fracture experiment
Proteins are found embedded in the bilayer, rather than in layers on either side of the phospholipid bilayer
what evidence does the Frye and Edinin experiment show
The proteins of two cells were labelled with different colour fluorescent markers and fused. The coloured markers intermixed.
what feature of the cell membrane fluid mosaic model which is supported by the evidence in the experiment by Frye and Edinin
The membrane is fluid
which allows many proteins to move (as the
phospholipids move)
what feature of the cell membrane fluid mosaic model which is supported by the evidence in the experiment by Unwin and Henderson
Intrinsic/integral proteins are fully embedded in the cell membrane
Extrinsic/peripheral proteins are loosely associated with the cell membrane
what evidence does the Unwin and Henderson experiment show
Some proteins can only be released from the cell membrane using strong detergents which dissolve the membrane. Others can be released more easily by increasing ionic strength.
