Cellular Respiration

Last update by mayurcooled on 04/17/2014
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What best describes the main purpose of the combined processes of glycolysis & cellular respiration?

Conserving the energy in glucose & related molecules in a chemical form that cells can use for work.

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  • JanetMayorga
    In the combined processes of glycolysis & cellular respiration, what is consumed & what is produced?
    Glucose is consumed.
    Carbon dioxide is produced.
  • JanetMayorga
    What best describes the process of glycolysis?
    Glycolysis represents the 1st steps in the chemical oxidation of glucose by a cell & it produces ATP & NADH.
  • JanetMayorga
    A glucose molecule is completely broken down to carbon dioxide & water in the glycolysis & citric acid cycle, but together these two processes yield only few molecules of ATP. What happened to most of the energy that the cell obtains from oxidation of glucose?
    The electrons obtained from the oxidation of glucose are temporarily stored in NADH & FADH2.
    The energy derived from the oxidation of NADH & FADH2 is used to drive the electron transport chain & chemiosmotic synthesis of ATP.
  • JanetMayorga
    What is a fact about the citric acid cycle?
    The last reaction in the citric acid cycle produces a product that is a substrate for the first reaction of the citric acid cycle.
  • JanetMayorga
    The electrons stripped from glucose in cellular respiration end up in which compound?
  • JanetMayorga
    What is a fact about the chemiosmotic synthesis of ATP?
    The chemiosmotic synthesis of ATP requires that the electron transport in the inner mitochondrial membrane be coupled to proton transport across the same membrane.
  • JanetMayorga
    What is a fact about the redox reactions of the electron transport chain?
    The redox reactions of the electron transport chain are directly coupled to the movement of protons across a membrane.
  • JanetMayorga
    In the absence of oxygen, what is the net gain of ATP for each glucose molecule that enters glycolysis?
    2 ATP

    4 ATP are made, but 2 ATP are consumed to start the process of glycolysis.
  • JanetMayorga
    In most cells, not all carbon compounds that participate in glycolysis & the citric acid cycle are converted to carbon dioxide by cellular respiration respiration. What happens to the carbon in these compounds that does not end up as CO2?
    The carbon compounds are removed from these processes to serve as building blocks for other complex molecules.
  • JanetMayorga
    What is the final electron acceptor of the electron transport chain that functions in aerobic oxidative phosphorylation?
  • JanetMayorga
    When electrons flow along the electron transport chains of mitochondria, what change occurs?
    The pH of the matrix increases.
Cellular Respiration
Cellular Respiration
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