cell structure

• what is a prokaryotic cell? 


  a single celled organism
• what is a eukaryotic cell ?

  organisms made up of eukaryotic cells
• what is the function of the nucleus?

  controls activities of the cell and contains genetic material
• what is the function of the cytoplasm?

  a gel like substance where most chemical reactions take place
• what do cytoplasm contain and what is their function?

  cytoplasm contain enzymes which control these chemical reactions
• what does the cell membrane do?

  holds the cell together and controls what goes in and out of the cell
• what is the function of mitochondria?

  the site of aerobic respiration
• what do mitochondria release?

  energy
• what is the function of ribosomes ?

  where protein synthesis occurs
• what extra sub - cellular structures do plant cells have in comparison to animal cells?

  cell wall, chloroplasts, permanent vacuole
• what is the function of the cell wall?

  a rigid structure made from cellulose which strengthens and supports the cell
• what is the permanent vacuole made out of ?

  contains cell sap and a weakened solution of sugars and salts
• what is the function of the chloroplasts ?

  • contain a green pigment known as chlorophyll which absorbs light for photosynthesis to occur to produce food for the plant
• what type of cell are bacteria cells?

  prokaryotic
• what structures and in a bacteria cell?

  • plasmids
  • cell wall
  • cytoplasm
  • circular strand of DNA
  • cell membrane
• what sub cellular structures do bacteria cells NOT have?

  a 'true' nucleus
• what are plasmids?

  circular small rings DNA