Cell Biology Weekly Quiz 5
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Questions and Answers

During alcoholic fermentation, pyruvate is reduced via a two-step process that regenerates NADH and produces carbon dioxide as a byproduct.

False

Nicotinamide adenine dinucleotide becomes reduced when it...

  • Is phosphorylated
  • Loses a hydrogen atom and two electron
  • Gains two hydrogen atoms and two electrons
  • Gains a hydrogen and two electrons (correct)
  • Which statement is true?

  • Both porins and cardiolipin are found in the matrix of the mitochondria
  • Porins are found in the outer mitochondrial membrane; cardiolipin is found in the inner mitochondrial membrane (correct)
  • Both porins and cardiolipin are found in the inner mitochondrial membrane
  • Porins are found in the inner mitochondrial membrane; cardiolipin is found in the outer mitochondrial membrane
  • Which of the following direct products are not produced by pyruvate oxidation?

    <p>Water</p> Signup and view all the answers

    Which of the following processes occur in the mitochondrion?

    <p>All of the above</p> Signup and view all the answers

    Mitochondria are dynamic energy converting organelles that house the enzymes for glycolysis and the citric aid cycle.

    <p>False</p> Signup and view all the answers

    Porins, found in the inner mitochondrial membrane, contain beta-sheets in their transmembrane domains, and allow moderately-sized molecules through membranes.

    <p>False</p> Signup and view all the answers

    The protein complexes of the electron transport chain generate a proton gradient across the inner mitochondrial membrane.

    <p>True</p> Signup and view all the answers

    Which of the following is required for a hydrolysis reaction?

    <p>Water</p> Signup and view all the answers

    Lipid rafts are characterozed by...

    <p>High concentration of sphinogolipids</p> Signup and view all the answers

    Nicotinamide adenine dinucleotide becimes reduced when it...

    <p>Gains a hydrogen atom and two electrons</p> Signup and view all the answers

    --- function like a fence to block membrane protein movement between various regions of an intestinal epithelial cell membrane.

    <p>Tight junctions</p> Signup and view all the answers

    Alcoholic fermentation has which of the following features?

    <p>All of the above</p> Signup and view all the answers

    Endosymbiosis proposes that mitochondria and chloroplasts both evolved from Prokaryotic cells.

    <p>True</p> Signup and view all the answers

    Study Notes

    Alcoholic Fermentation

    • During alcoholic fermentation, pyruvate is reduced via a two-step process that regenerates NAD+ and produces carbon dioxide as a byproduct.

    Mitochondria

    • Mitochondria are dynamic energy-converting organelles that house the enzymes for glycolysis and the citric acid cycle.
    • Porins in the inner mitochondrial membrane contain beta-sheets in their transmembrane domains, allowing moderately-sized molecules to pass through membranes.
    • Protein complexes of the electron transport chain generate a proton gradient across the inner mitochondrial membrane.

    NAD+

    • Nicotinamide adenine dinucleotide (NAD+) becomes reduced when it gains electrons.

    Hydrolysis Reaction

    • Water is required for a hydrolysis reaction.

    Lipid Rafts

    • Lipid rafts are characterized by... (no additional information provided)

    Cell Membrane

    • ...function like a fence to block membrane protein movement between various regions of an intestinal epithelial cell membrane.

    Endosymbiosis

    • Endosymbiosis proposes that mitochondria and chloroplasts evolved from prokaryotic cells.

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