Respiration

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Author:
muggerboi93
ID:
93879
Filename:
Respiration
Updated:
2011-07-13 09:59:22
Tags:
BIOLOGY
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Description:
BIOLOGY
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  1. What is ATP?
    • Adenosine Triphosphate
    • Main source of energy for cell metabolism
  2. ATP consists of ?
    • Adenine molecule
    • Ribose Sugar
    • 3 Phosphate group
    • ALL condensed together
  3. ATP is hydrolysed into ADP
    • 30.6 kJ per mole of ENERGY is released
    • BREAK THE BOND BETWEEN 2ND AND 3RD PHOSPHATE GROUP (hence energy is stored there)
    • Instability of the phosphate bond makes ATP an excellent energy donor.
    • As they are highly negatively charged hence repel one another strongly, as phosphate bonds are easily broken
  4. ATP is formed in the following processes
    • Substrate level phosphorylation
    • Oxidative phosphorylation
  5. Significance of ATP
    • Universal Energy Carrier
    • Mobile Energy Carrier
    • Easily Formed
    • Source of energy for many energy-requiring processess (i.e ACTIVE TRANSPORT)
  6. Cell respiration is the process whereby
    organic compounds are oxidised within the cells to release chemical energy stored as ATP
  7. Respiratory substrates are
    • Carbohydrates (FIRST)
    • Fats
    • Proteins (LAST)
  8. Glycolysis occurs where?
    outside the mitochondrion at the cytosol
  9. Krebs cycle and ETC located?
    Inside the mitochondrion
  10. ATP is formed in 2 ways namely :
    • Substrate level Phosphorylation
    • Oxidative Phosphorylation
  11. Substrate level phosphorylation
    is the phosphorylation of ADP with inorganic phosphate groups to form ATP

    • Glycolysis (cytoplasm)
    • Krebs cycle (mitochondrial matrix)

    Only small amount of ATP is generated this way
  12. Oxidative Phosphorylation

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