Cellular Respiration: Three Main Stages
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Questions and Answers

Where does glycolysis take place?

  • Cytoplasm (correct)
  • Cell membrane
  • Endoplasmic reticulum
  • Nucleus
  • What is the end product of the Krebs Cycle?

  • Pyruvic acid
  • Glucose
  • There is no final end product (correct)
  • Citric acid
  • Where are the high-energy electrons passed to in the Electron Transport Chain?

  • Inner membrane of mitochondrion (correct)
  • Cell membrane
  • Nucleus
  • Endoplasmic reticulum
  • What is the first stage of glycolysis?

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

    Which of the following is NOT one of the main stages of cellular respiration?

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

    Where does the Krebs Cycle take place?

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

    Where does the electron transport chain (ETC) take place in eukaryotic cells?

    <p>Inner mitochondrial membrane</p> Signup and view all the answers

    Which molecule donates high-energy electrons to the electron transport chain?

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

    Which complex is the first protein complex in the electron transport chain, where NADH donates electrons?

    <p>Complex I (NADH dehydrogenase)</p> Signup and view all the answers

    Which molecule accepts the electrons from Complex I and shuttles them to the next complex in the electron transport chain?

    <p>Coenzyme Q (Ubiquinone)</p> Signup and view all the answers

    Which complex is directly associated with the citric acid cycle and can accept electrons from FADH₂?

    <p>Complex II (Succinate Dehydrogenase)</p> Signup and view all the answers

    What is the final protein complex in the electron transport chain?

    <p>Complex IV (Cytochrome c Oxidase)</p> Signup and view all the answers

    What is the terminal electron acceptor in the electron transport chain?

    <p>$O_2$ (oxygen)</p> Signup and view all the answers

    What does ATP synthase use to synthesize ATP from ADP and inorganic phosphate?

    <p>Proton gradient</p> Signup and view all the answers

    Where are protons actively pumped across during the electron transport chain, creating a proton gradient?

    <p>Inner mitochondrial membrane</p> Signup and view all the answers

    Which molecule is a mobile electron carrier that accepts electrons from both Complex I and Complex II and shuttles them to the next complex?

    <p>Coenzyme Q (Ubiquinone)</p> Signup and view all the answers

    Which stage of cellular respiration does not produce a final end product?

    <p>Kreb’s Cycle</p> Signup and view all the answers

    In which organelle does the Krebs Cycle occur?

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

    Where does glycolysis take place?

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

    What is the role of NADH and FADH2 in cellular respiration?

    <p>To accept high-energy electrons</p> Signup and view all the answers

    Where are the high-energy electrons passed to in the Electron Transport Chain?

    <p>Inner membrane of mitochondrion</p> Signup and view all the answers

    What is the primary function of ATP synthase in cellular respiration?

    <p>To convert ADP into ATP</p> Signup and view all the answers

    Which protein complex in the electron transport chain is directly associated with the citric acid cycle and can accept electrons from FADH₂?

    <p>Complex II</p> Signup and view all the answers

    Where are protons actively pumped across during the electron transport chain, creating a proton gradient?

    <p>Inner mitochondrial membrane</p> Signup and view all the answers

    Which molecule is a mobile electron carrier that accepts electrons from both Complex I and Complex II and shuttles them to the next complex in the electron transport chain?

    <p>Coenzyme Q (Ubiquinone)</p> Signup and view all the answers

    What is the terminal electron acceptor in the electron transport chain?

    <p>Oxygen (O₂)</p> Signup and view all the answers

    Where does the Krebs Cycle take place?

    <p>Mitochondrial matrix</p> Signup and view all the answers

    What does ATP synthase use to synthesize ATP from ADP and inorganic phosphate?

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

    Which of the following is NOT one of the main stages of cellular respiration?

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

    Where does glycolysis take place?

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

    Which complex is the first protein complex in the electron transport chain, where NADH donates electrons?

    <p>Complex I (NADH Dehydrogenase)</p> Signup and view all the answers

    Where does the electron transport chain (ETC) take place in eukaryotic cells?

    <p>Inner mitochondrial membrane</p> Signup and view all the answers

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