6. The fluidity of a membrane depends on the composition in terms of
Acyl chains
Thin protein fillaments
7. An aqueous environment enclosed by lipid bilayers is known as
Liposomes
Micelles
8. Lipid anchored membrane proteins may also be linked to glycosylphosphatidylinositol, which is present only in the outer leaflet and found in _________
Lipid rafts
Protein rafts
9. Gram positive bacteria have a _______ peptodoglycan cell wall
Thick
Thin
10. Gram negative bacteria have a ______ peptidoglycan cell wall
Thin
Thick
11. Peripheral proteins are easily removed from the membrane
True
False
12. Membranes are primarily held together by ________
Hydrophobic interactions
Covalent bonds
13. Membranes are ________
Asymmetric
Symmetric
14. Only one of the monolayers of the membrane is usually added to (inside), since transverse diffusion is slow this means
Lipids rarely flip between leaflets
Lipids are constantly flipping between leaflets to try and equalize the side
15. You can predict the prescence of transmembrane alpha helices using algorithms that detect hydrophobic amino acids
True
False
16. Lipid bilayers form _________
Spontaneously
Organized
17. Lateral diffusion is slow
False
True
18. _____________ membrane proteins associate with the hydrophobic acyl chains
Integral
Peripheral
19. Micells can form given the right environment - this is where a polar head forms outside and __________
Hydrophobic tail inside
Hydrophillic tail inside
20. Phospholipids have a glycerol backbone, two fatty acyl groups (tail) a phosphate group and _____
