1. What are cells?
    • The basic structural and functional units of all life
    • Average cell size is 0.1um
  2. What does the cell theory propose?
    • All living things consist of one or more organised structures at are called cells
    • All living things are composed of one or more cells, and that new cells are produced from existing ones
  3. Describe prokaryotic cells
    • Have little defined internal structure
    • No structure houses the DNA
    • Eg. Bacteria
  4. Describe Eukaryotic cells
    • Complex internal structure
    • Contain organelles
    • Have a nucleus
    • Organelles are held in place by the cytoskeleton
    • eg. animals, fungi, protists, plants
  5. What is the plasma membrane?
    • Present in animals and plants
    • It is a semi permeable boundary that controls the internal environment of the cell
  6. What is the Cell wall?
    • Present in all except animal cells
    • Rigid protective structure outside of plasma membrane
    • Made from carbohydrates (cellulose)
  7. What is the Cytoplasm?
    • The liquid where the organelles are foundĀ 
    • Where cellular metabolism occurs
  8. What are organelles?
    Membrane bound structures
  9. Describe the nucleus
    • Only found in eukaryotic cells
    • Houses the DNA and is the control centre of the cell. Determines metabolic activity
    • Covered by nuclear envelop (double layer membrane)
  10. What is the mitochondrion?
    • Found in Eukaryotic cells
    • The site of cellular respiration, production of ATP (energy compound)
  11. What are ribosomes?
    • Site for protein synthesis
    • Eukaryotic and Prokaryotic
    • Attached to the Endoplasmic reticulum
  12. What does the endoplasmic reticulum do?
    Collects the protein synthesised by ribosomes for transport throughout the cell
  13. What are lysosomes?
    • A sac within cells containing digestive enzymes
    • Can cause death of cell
    • Responsible for destruction and digestion of unwanted material with the cell
  14. What are chloroplasts responsible for?
    • In plant cells
    • Site of photosynthesis
    • Contain chlorophyll (absorbs light)
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