Lecture 008 Summary

Lecture 008 Summary - Lecture 008 Cell Division Prokaryotic...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 008 – Cell Division Prokaryotic cells (including bacteria and archaea) have no nucleus, though has DNA as it’s genome (an organism’s genetic material). Most cells in humans and animals are not actively dividing. Cell division occurs for: tissue renewal, repair, or growth. Examples include skin cells, blood cells, and the cells that constitute the lining of the intestines. In plants, growth goes both vertically (growth of stem upwards and formation of new buds), and horizontally (growing outwards of the trunk for example, hence causing rings) Stem Cells: they regenerate by themselves, and their future generations become progressively more differentiated. Stem cells divide asymmetrically, that is one of the daughter cells remains a stem cell, while the other cell becomes another type of cell. In relation to this, the mutation of stem cells or their progeny may give rise to cancer stem cells. Because stem cells divide asymmetrically, failure to not kill the mutated stem cell will mean the cancer survives. DNA is composed of a double helix structure, with 2 anti parallel strands, with covalently bonded
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/04/2009 for the course BIOLOGY 1222 taught by Professor Haffie during the Spring '09 term at UWO.

Page1 / 2

Lecture 008 Summary - Lecture 008 Cell Division Prokaryotic...

This preview shows document pages 1 - 2. Sign up to view the full document.

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