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Glycolysis quiz

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  • What is glycolysis and what does the term mean?
    Glycolysis is the first step of cellular respiration, breaking down glucose into 2 pyruvate molecules. The term means 'breaking down sugar,' specifically glucose.
  • Where does glycolysis occur within the cell?
    Glycolysis occurs in the cytoplasm, outside of the mitochondria.
  • How many carbon atoms are in a glucose molecule and how are they distributed after glycolysis?
    Glucose has 6 carbon atoms, which are split into two pyruvate molecules, each containing 3 carbon atoms.
  • Does glycolysis require oxygen to function?
    No, glycolysis can occur with or without oxygen.
  • How many phases are there in glycolysis and what are they called?
    There are two phases: the energy investment phase and the energy harvest phase.
  • What happens during the energy investment phase of glycolysis?
    The cell uses 2 ATP molecules to produce 2 Glyceraldehyde 3 Phosphate (G3P) molecules.
  • What is the intermediate molecule between the two phases of glycolysis?
    Glyceraldehyde 3 Phosphate (G3P) is the intermediate molecule.
  • What are the main products of the energy harvest phase?
    The energy harvest phase produces 4 ATPs and 2 NADH molecules.
  • What is the net gain of ATP from glycolysis?
    The net gain is 2 ATP molecules, since 2 are used and 4 are produced.
  • What are the end products of glycolysis?
    The end products are 2 pyruvate molecules, 2 NADH, and a net gain of 2 ATP.
  • Where do the pyruvate molecules go after glycolysis in eukaryotic cells?
    They are transported to the mitochondrial matrix for further steps in cellular respiration.
  • What mnemonic can help remember the phases of glycolysis?
    The mnemonic is 'Gary invests to harvest his profits and travel to Mexico.'
  • What does the 'invest' part of the mnemonic refer to?
    It refers to the energy investment phase, where 2 ATPs are used.
  • What does the 'harvest' part of the mnemonic refer to?
    It refers to the energy harvest phase, where energy is produced as ATP and NADH.
  • Why is glycolysis unique among the stages of cellular respiration?
    It is the only stage that occurs outside the mitochondria and does not require oxygen.