Plant and animal cells
- animal cells and plant cells both have
- a neucleus (contains DNA that controls what the cell does)
- cytoplasm (gel-like substance where most of the chemical reactions happen.)
- cell membrane (holds the cell together and controls what goes in and out.)
- mitochondria (these are where most of the reactions for resperation take place... respiration releases energy that the cell needs to work).
3 extra things that the plant cell has
1) RIGID CELL WALL (made of cellulose gives support for the cell)
2) LARGE VACUOLE (contains cell sap, a weak soloution of sugar and salts)
3) CHLOROPLASTS (where photosynthesis occurs, they contain a green substance called chlorophyll)
bacteria cells have no neucleus!
bacteria cells are a lot smaller than plant or animal cells and have these features:
- 1) chromosomal DNA (one long circular chromosone) controls the cells activities and replication. it floats free in the cytoplasm (not in a neucleus)
- 2) plasmids are small loops of extra DNA that aren't part of the chromosone. plasmids contain genes for things like drug resistance, and can be passed between bacteria.
- 3) flagellum (plural flagella) is a long hair like structure that rotates to make bacterium move.
- 4) cell wall the cell is supported by the cell wall.