Set3A_Dr._Wilson_MCDB1A2010

Set3A_Dr._Wilson_MCDB1A2010 - Set 3A Cell Division in...

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

View Full Document Right Arrow Icon
Set 3A Cell Division in Prokaryotes; The Cell Cycle and DNA condensation in Eukaryotes !
Background image of page 1

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

View Full Document Right Arrow Icon
Chromosomes in Prokaryotes- Important Features Prokaryotes have one chromosome It usually takes the form of a closed circle made of double stranded DNA with some proteins The stretched out length of a prokaryotic chromosome is ~ 1500 μm (the cell is 1-2 μm) So, it must be tightly folded to fit inside the cell
Background image of page 2
A spread out E. coli chromosome (electron micrograph)
Background image of page 3

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

View Full Document Right Arrow Icon
Cell Division in Prokaryotes- Binary Fission The bacterial chromosome is usually attached to the cell membrane at the origin of replication After the DNA replicates, the attachment points of the two chromosomes move apart as the cell elongates, making new membrane-taking the rest of the chromosome along The cells pinch off in the center, forming 2 cells
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 Document Right Arrow Icon
Figure 11.2 Prokaryotic Cell Division (Part 1) Cell division ( binary fission ) in a prokaryote
Background image of page 6
Figure 11.2 Prokaryotic Cell Division (Part 2)
Background image of page 7

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

View Full Document Right Arrow Icon
The Cell Cycle and Cell Division in Eukaryotes More complex than in prokaryotes
Background image of page 8
The Cell Cycle is divided into 4 Stages 1) Period of DNA synthesis-- “ S ” phase 2) Mitosis (chromosome separation) -- “ M ” phase 3) The stage between M and S-- GAP1 G1 4) The stage between S and M -- GAP 2 G2 G1, S, and G2 together is known as interphase
Background image of page 9

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

View Full Document Right Arrow Icon
Figure 11.3 The Eukaryotic Cell Cycle
Background image of page 10
The Eukaryotic Cell Cycle is Tightly Controlled Control is by a class of enzymes, called cyclin- dependent kinases
Background image of page 11

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

View Full Document Right Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 37

Set3A_Dr._Wilson_MCDB1A2010 - Set 3A Cell Division in...

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