ch11 - The hydrolysis of nucleoside triphosphates (NTPs)...

Info iconThis preview shows pages 1–15. Sign up to view the full content.

View Full Document Right Arrow Icon
The hydrolysis of nucleoside triphosphates (NTPs) A. is required for them to act as regulatory molecules. B. is needed for their function as cofactors. C. allows for hydrogen bonding of double-stranded DNA. D. provides the chemical energy needed for some biochemical reactions.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1 9 8-4 Is this bond or ? always N-glycosidic bond
Background image of page 2
8-27 Why does melting point of DNA increase with more G+C? 3 H-bonds vs. 2 for A-T DNA melting can be monitored by UV absorption which increases with temp ( hyperchromic effect ).
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Which of the following is true about motion of membrane lipids? A. They can move most rapidly when in the gel phase. B. Lateral diffusion is catalyzed by flippase proteins. C. To increase the fluidity of membranes at low temperatures, cells synthesize more saturated fatty acids and fewer unsaturated fatty acids. D. Transbilayer (flip-flop) diffusion involves the transfer of lipids from one face of the bilayer to another.
Background image of page 4
Membranes and Transport Chapter 11 What does it take for a cell to be “alive”? • Integrity of compartment • Energy • Respond to environment • Reproduce itself
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
11-3 Lipid Bilayer
Background image of page 6
11-4 What force drives lipids into these structures? Hydrophobic interactions 2 x 15 = 30 Å ~20-30 Å Total thickness ~50-60 Å (5-6 nm) Membrane lipids = amphipathic molecules
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Bilayer is a two-dimensional fluid 11-16
Background image of page 8
Why is this slow compared with lateral diffusion? Very difficult to pass hydrophilic head group through hydrophobic interior of bilayer 11-16
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
How do you think these enzymes work? Probably provides a hydrophilic path for the polar head group through hydrophobic interior of bilayer 11-16
Background image of page 10
11-15 Low temp High temp Membrane fluidity
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
11-19 Membrane proteins also diffuse laterally unless anchored to cytoskeleton
Background image of page 12
Bilayer is asymmetrical: lipid asymmetry 11-5
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Bilayer is asymmetrical: protein asymmetry
Background image of page 14
Image of page 15
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/02/2009 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas.

Page1 / 51

ch11 - The hydrolysis of nucleoside triphosphates (NTPs)...

This preview shows document pages 1 - 15. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online