Cells

Cells

1. All cells contain:

   • DNA
     • In a double helix shape
     • Contain the genetic code
   • Organelles
     • Helps the cell perform a specific function

2. Animal cells

   • cytoplasm
     • Where chemical reactions take place
       • Anaerobic respiration
       • production of enzymes an proteins
   • Mitochondria
     • Where aerobic respiration takes place
   • nucleus
     • Where the DNA and code for making enzymes and proteins within the cell are held
   • cell membrane
     • Allows water and certain gassesin and out but keeps other chemicals from passing through

3. Plant cells

   • Cell wall
     • strengthens cell
   • Permanent vacuole
     • Helps support the cell
   • chloroplasts
     • Contains the green pigment chlorophyll which helps absorb light energy
     • Contains some enzymes needed for photosynthesis

4. Microbial cells

   • Bacteria cells
     • Cytoplasm
       • contains enzymes for both aerobic and anaerobic respiration
     • Cell wall
       • Supports cell: unlike plants cells it is not made of cellulose but instead of proteins
     • Cell membrane
       • Allows certain gasses and chemicals to enter and leave the cell freely and acts as a barrier to other chemicals and gasses
     • DNA
       • circular in shape and floats freely in the cytoplasm