Skip to main content
Pearson+ LogoPearson+ Logo

Krebs Cycle quiz #2 Flashcards

Krebs Cycle quiz #2
Control buttons has been changed to "navigation" mode.
1/16
  • Which is a product of the Krebs Cycle?
    The products of the Krebs Cycle include 2 ATP, 6 NADH, 2 FADH2, and 4 CO2 per glucose molecule.
  • Which includes the Krebs Cycle and electron transport and is an aerobic process?
    Aerobic cellular respiration includes the Krebs Cycle and the electron transport chain.
  • In which organelle does the Krebs Cycle occur?
    The Krebs Cycle occurs in the mitochondria.
  • Which is the series of reactions in which pyruvate is broken down into carbon dioxide?
    The Krebs Cycle is the series of reactions where pyruvate is broken down into carbon dioxide.
  • What is another name for the Krebs Cycle?
    The Krebs Cycle is also known as the citric acid cycle or TCA cycle.
  • What molecule does Acetyl CoA react with to form citrate in the Krebs Cycle?
    Acetyl CoA reacts with oxaloacetate to form citrate in the Krebs Cycle.
  • How many carbon dioxide molecules are produced per glucose molecule in the Krebs Cycle?
    Four carbon dioxide molecules are produced per glucose molecule in the Krebs Cycle.
  • What is the role of NADH and FADH2 produced in the Krebs Cycle?
    NADH and FADH2 carry electrons to the electron transport chain for ATP production.
  • What is the first phase of the Krebs Cycle called?
    The first phase of the Krebs Cycle is called Acetyl CoA Entry.
  • How many ATP molecules are produced per Acetyl CoA in the Krebs Cycle?
    One ATP molecule is produced per Acetyl CoA in the Krebs Cycle.
  • What are the three alternative names for the Krebs Cycle, and why are they used interchangeably?
    The Krebs Cycle is also known as the citric acid cycle and the TCA (tricarboxylic acid) cycle; these names are used interchangeably because they all refer to the same metabolic pathway.
  • What are the three main phases of the Krebs Cycle, and what occurs in each phase?
    The three phases are: Acetyl CoA Entry (formation of citrate), Citrate Oxidation (production of ATP, NADH, and CO2), and Oxaloacetate Regeneration (regeneration of oxaloacetate and production of NADH and FADH2).
  • What are the total outputs of the Krebs Cycle per glucose molecule?
    The total outputs per glucose are 2 ATP, 6 NADH, 2 FADH2, and 4 CO2.
  • What happens to the carbon dioxide produced during the Krebs Cycle?
    The carbon dioxide produced is exhaled as a waste product.
  • What is the significance of oxaloacetate in the Krebs Cycle?
    Oxaloacetate is significant because it reacts with Acetyl CoA to start the cycle and is regenerated at the end to allow the cycle to continue.
  • What is the fate of the CoA portion of Acetyl CoA during the Krebs Cycle?
    The CoA portion does not enter the Krebs Cycle; it is recycled for use in other reactions.