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.

H ow are lys o s omes produced?

Lysosomes in animal cells

Lysosomes in plant cells

Wh at is in the lyso some ?

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

partII

Single-Wall Membrane

A n e a t i n t r o d u c t i o n v i d e o Link: http://highered.mcgraw-hill.com/olc/dl/120067/bio01.swf

Sources

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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