Lysosomes
By Jerry Hsiung and Alex Mirbod
W h a t i s a Ly s o s o m e ?
Lysosome: A membrane-bound organelle that is
found in the cytoplasm of most cells which contains
various hydrolytic enzymes and functions in
intracellular digestion.
How are lys o s omes
produced?
Lysosomes in
animal cells
Lysosomes in
plant cells
What is in the
lysosome ?
Acidic PH 4.5 - 5
Enzymes- they can digest:
- lipids ex: Lipase
- carbohydrates ex: Amylase
- proteins ex: Proteases
- nucleic acids ex: Nucleases
Functions
1. Breaking up macromolecules
2. Defend the cell
3. A “Suicide Bag”
1. Breaking up macromolecules
Dead cells & food…etc
Animation:
http://www.tvdsb.on.ca/westmin/science/sbi3a1/Cells/lyso.htm
2. Defend the cell & body
White blood cell engulfing bacterium
3. A Suicide Bag (Sac)
Structure
0.1 – 1.5µm
Structure
Single-Wall Membrane
partII
A neat introduction
video
Link:
http://highered.mcgraw-hill.com/olc/dl/120067/bio01.swf
Sources
1.
2.
3.
4.
5.
6.
7.
8.
9.
http://www.biology4kids.com/files/cell_lysosome.html
http://www.daviddarling.info/encyclopedia/L/lysosome.html
http://molecular.magnet.fsu.edu/cells/lysosomes/lysosomes.htm
http://www.tvdsb.on.ca/westmin/science/sbi3a1/Cells/lyso.html
http://farm4.static.flickr.com/3011/2771162044_00d62b0048.jpg?v=0
http://www.rocklin.k12.ca.us/staff/dfix/zenith/handouts/organelles/ly
sosome_tem.jpg
http://www.healthvalue.net/files/gaucher.gif
http://images.protopage.com/view/721389/1854gk07so11gu766laupt
jlr.jpg
http://highered.mcgraw-hill.com/olc/dl/120067/bio01.swf