7. The three classes of membrane prroteins are ____________, peripheral membrane proteins and lipid anchored proteins
Inner membrane proteins
Integral membrane proteins
Outer membrane proteins
8. Membranes are responsible for generating and __________ the proton gradients essential for the production of ATP
Maintaining
Protecting
Distributing
9. Lipid anchored membrane proteins are tethered to a membrane through a ___________ bond to a lipid anchor
Hydrophobic
Covalent
Disulphide
Ionic
10. Simple ___________, where an amino acid is linked to a fatty acyl group (which is inserted into the cytoplasmic leaflet of the bilayer) are commonly found in viruses and eukaryotic cells
Lipid anchored proteins
Integral membrane proteins
Peripheral anchored membrane proteins
11. Transverse diffusion is ________
Slow
Fast
12. A few membrane proteins move quickly, but most move slowly - around ____________ times slower than lipids
600 - 800
100 - 500
500 - 5000
13. Lateral diffusion is ________
Fast
Slow
14. You can predict the presense of transmembrane alpha helices using algorithms and _____________ amino acids
Hydrophobic
Hydrophillic
15. Proteins only undergo _________ diffusion
Lateral
Transverse
16. Membrane proteins are very hard to work with because
They do not crystallise readily
They are too small
17. Many cells have membranes with specialised structures
True
False
18. Some membrane proteins serve as selective ________ that control the transport of ions and small molecules in and out of the cell
Cholesterols
Pumps
Enzymes
Trains
19. Lipid __________ are the main structural component of all biological membranes
Micells
Monolayers
Bilayers
Layers
20. Peripheral membrane proteins are ___________ dissociated by the membranes
