Intro and Glycolysis

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  1. Purpose of Aerobic Cell Resp
    to transfer energy from glucose or some other organic molecule to ATP; a cell stores energy in ATP
  2. This transfer is done in approximately __ interconnected chemical reactions, i.e. a __. If all of the energy in glucose was released at once, it would be released in a quantity too alarge for the clel to use. By releasing the energy in small amounts, more can be used by the cell.
    • twenty
    • biochemical pathway
  3. In brief, when a glucose molecule interacts chemically with O2, what happens?
    This is, in essence, __ of glucose. In the process, the chemical bond energy in glucose is __ and the cell __ it in molecules of __.
    • the glucose splits apart and its atoms are regrouped into CO2 and H20
    • "controlled burning" 
    • released
    • captures
    • ATP
  4. What is the efficiency of Aerobic Cell Resp?
    a molecule of glucose contains enough energy to make about 100 ATP molecules
  5. When burned in a flask, what happens?
    100% of the energy in a glucose molecule is released in the forms of heat and light
  6. In aerobic cellular respiration, a cell typically banks only about __ of gluocse molecule's energy in __. Net yield is __ molecules of ATP for each glucose molecule respired. Most of hte remaining energy is __ and lost from the organism. 
    • 40% 
    • ATP
    • 36 
    • converted to heat
  7. Alhtouigh this efficiency may seem low, it is higher than most mechanical engines. For example, the efficiency of an automobile engine is baout __.
  8. The entire process of aerobic resp., starting with glucose and ending with __, __, and __ occurs in three main stages: __?__
    • CO2
    • H20
    • ATP
    • Glycolysis
    • Krebs cycle
    • ETC
  9. __ is the most universal form of energy metabolism; it occurs in most, if not all, organisms and occurs in the __.
    • glycolysis
    • cytosol
  10. No __ is required for glycolysis to occur.
  11. Glycolysis begins respiration by __.
    __ chemical reactions are needed to accomplish this. Each molecule of __ contains __ carbon atoms.
    • breaking glucose into two molecules of pyruvate
    • ten
    • pyruvate
    • three
  12. BEcause two molecules of pyruvate contain less energy than one molecule of glucose, energy is __ in this series of reactions. That energy is used to drive two types of __ reactions: __?__
    • released
    • endergonic
    • 1) synthesis of ATP directly
    • 2) synthesis of NADH+ H+ from NAD+, which shuttles electirons to the ETC; those electrons carry energy that is used to make ATP
  13. Glycolysis will not continue without what?
    supply of NAD+ and ADP
  14. Net gain to cell per glucose molecule due to glycolysis
    • 2 pyruvate
    • 2 ATP
    • 2 NADH
  15. Glycolysis couples the exergonic reaction of __ to the ender gonic reaction of __.
    • ATP to ADP and Pi
    • glucose to another molecule
  16. Nad+ to NADH is (oxidized/ reduced)?
  17. In which step of glycolysis is heat lost?
    Step eight
  18. In which steps is energy stored?
    step six is first step and step seven
Card Set:
Intro and Glycolysis
2012-11-14 07:11:56
Cell Resp

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