Lecture_14_2011_1

Lecture_14_2011_1 - One-dimensional diffusion from a point...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Introduction to Biophysics Lecture 14 Cell organization Diffusion
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
DNA Replication DNA replication. The double helix is unwound by a helicase and topoisomerase. Next, one DNA polymerase produces the leading strand copy. Another DNA polymerase binds to the lagging strand. This enzyme makes discontinuous segments before DNA ligase joins them together.
Background image of page 3

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

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5

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

View Full DocumentRight Arrow Icon
Background image of page 6
Techniques to observe cells: 1.Visible light microscopy (call can be alive) 2.Electron microscopy (cell is dead) 3.X-ray microscopy
Background image of page 7

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

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9

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

View Full DocumentRight Arrow Icon
=0.01 =1 =2 =4 =20 Mass conservation a property which is built into the diffusion equation, and it is wise to check a solution to be sure that this condition is satisfied.
Background image of page 10
Background image of page 11

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

View Full DocumentRight Arrow Icon
Background image of page 12
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: One-dimensional diffusion from a point Shows how long it will take a metabolite to diffuse through a cell when it is produced at one location. Diffusion at steady state The diffusing substance enters in one place and exits from another at the same rate. The substance thus diffuses from a source to a sink, with a continuous drop in concentration along the way. There will be a steady flux of material through the system, as the flow into each volume element perfectly balances the flow out. Such a system is said to be in a steady state. Laplace equation Homework: Nelson, Your turn 4G, page 143...
View Full Document

Page1 / 12

Lecture_14_2011_1 - One-dimensional diffusion from a point...

This preview shows document pages 1 - 12. Sign up to view the full document.

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