Chapter 9

Last update by mayurcooled on 04/16/2014
70656 People have viewed this Quiz
  • Share

Exposing inner mitochondrial membranes to ultrasonic vibrations will disrupt the membranes. However, the fragments will reseal "inside out." These little vesicles that result can still transfer electrons from NADH to oxygen and synthesize ATP. If the membranes are agitated still further however, the ability to synthesize ATP is lost.

After the first disruption, when electron transfer and ATP synthesize still occur, what must be present?
a. all of the electron transport proteins as well as ATP synthase
b. all of the electron transport system and the ability to add CoA to acetyl groups
c. the ATP synthase system is sufficient
d. the electron transport system is sufficient
e. plasma membranes like those bacteria use for respiration

Answer:
A: all of the electron transport proteins as well as ATP synthase

View Chapter 9 as Flashcard Deck

Related Quiz Content
  • Someone
    Answered in Chapter 9
    Exposing inner mitochondrial membranes to ultrasonic vibrations will disrupt the membranes. However, the fragments will reseal "inside out." These little vesicles that result can still transfer electrons from NADH to oxygen and synthesize ATP. If the membranes are agitated still further however, the ability to synthesize ATP is lost.

    After the second agitation of the membrane vesicles, what must be lost from the membrane?
    a. the ability of NADH to transfer electrons to the first acceptor in the electron transport chain
    b. the prosthetic groups like heme from the transport system
    c. cytochromes
    d. ATP synthase, in whole or in part
    e. the contact required between inner and outer membrane surfaces
    D: ATP synthase, in whole or in part
  • Someone
    Answered in Chapter 9
    Exposing inner mitochondrial membranes to ultrasonic vibrations will disrupt the membranes. However, the fragments will reseal "inside out." These little vesicles that result can still transfer electrons from NADH to oxygen and synthesize ATP. If the membranes are agitated still further however, the ability to synthesize ATP is lost.

    It should be possible to reconstitute the abilities of the vesicles if which of the following is added?
    a. cytochromes
    b. extra NADH
    c. a second membrane surface
    d. more electrons
    e. intact ATP synthase

    E: intact ATP synthase
  • Someone
    Answered in Chapter 9
    The accompanying figure shows the electron transport chain. Which of the following is the combination of substances that is initially added to the chain?
    a. oxygen, carbon dioxide, and water
    b. NAD+, FAD, and electrons
    c. NADH, FADH2, and protons
    d. NADH, FADH2, and electrons
    e. oxygen and electrons
    D: NADH, FADH2, and electrons
  • Someone
    Answered in Chapter 9
    Which of the following most accurately describes what is happening along this chain?
    a. Chemiosmosis is coupled with electron transfer.
    b. Each electron carrier alternates between being reduced and being oxidized.
    c. ATP is generated at each step.
    d. Energy of the electrons increases at each step.
    e. Molecules in the chain give up some of their potential energy.
    B: Each electron carrier alternates between being reduced and being oxidized.
  • Someone
    Answered in Chapter 9
    The parts of the figure labeled with Roman numerals symbolize what concept?
    a. different inner mitochondrial membranes
    b. different mitochondrial functioning together
    c. molecules with different attached metal ions
    d. carbohydrate framework holding the molecules in place
    e. multimeric groups of proteins in 4 complexes
    E: multimeric groups of proteins 4 complexes
  • Someone
    Answered in Chapter 9
    What happens at the end of the chain?
    a. The 2 original electrons combine with NAD+
    b. The 2 original electrons combine with oxygen
    c. 4 electrons combine with oxygen and protons
    d. 4 electrons combine with hydrogen and oxygen atoms
    e. 1 electron combines with oxygen and hydrogen
    C: 4 electrons combine with oxygen and protons
  • Someone
    Answered in Chapter 9
    Which of the following couples chemiosmosis to energy storage?
    a. NADH
    b. FADH2
    c. cytochromes
    d. electron transport
    e. ATP synthase
    E: ATP synthase
  • Someone
    Answered in Chapter 9
    Which of the following describes ubiquinone?
    a. a protein in the electron transport chain
    b. a small hydrophobic coenzyme
    c. a substrate for synthesis of FADH
    d. a vitamin needed for efficient glycolysis
    e. an essential amino acid
    B: a small hydrophobic enzyme
  • Someone
    Answered in Chapter 9
    Which of the following normally occurs whether or not oxygen (O2) is present?
    a. glycolysis
    b. fermentation
    c. oxidation of pyruvate to acetyl CoA
    d. citric acid cycle
    e. oxidative phosphorylation (chemiosmosis)
    A: glycolysis
  • Someone
    Answered in Chapter 9
    Which of the following occurs in the cytosol of a eukaryotic cell?
    a. glycolysis and fermentation
    b. fermentation and chemiosmosis
    c. oxidation of pyruvate to acetyl CoA
    d. citric acid cycle
    e. oxidative phosphorylation
    A: glycolysis and fermentation