Mitochondria Proteins and Functions Quiz
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Questions and Answers

What is the site where replication takes place in Human Mitochondrial DNA?

  • Respiratory complexes
  • Ribosomal RNAs
  • D Loop (correct)
  • Transfer RNAs
  • Which organelle contains its own genetic information?

  • Mitochondria (correct)
  • Endoplasmic Reticulum
  • Nucleus
  • Ribosomes
  • What is the main idea behind the endosymbiosis theory regarding mitochondria?

  • Mitochondria evolved directly from the nucleus
  • Mitochondria originated from absorbed bacteria (correct)
  • Mitochondria have no genetic information
  • Mitochondria are entirely man-made structures
  • Which type of diseases are linked to mutations in mitochondrial DNA?

    <p>Neurodegenerative diseases</p> Signup and view all the answers

    Why do mitochondrial proteins require a signaling sequence?

    <p>To bring them into the mitochondria</p> Signup and view all the answers

    Which cell process can lead to Alzheimer's or acquired immunodeficiency syndrome if excessive?

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

    What is the function of the signal sequence found at the N terminals of proteins during transport?

    <p>Facilitates secretion of proteins</p> Signup and view all the answers

    Which organelle is crucial in controlling the rate of oxidative phosphorylation?

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

    What is the main function of chaperones in the lumen of rough ER?

    <p>Recognize misfolded proteins and correct them</p> Signup and view all the answers

    Which process involves the return of internalized receptors from endosomes to the plasma membrane?

    <p>Low-density lipoprotein (LDL) release</p> Signup and view all the answers

    What is the main function of the intermembrane space in mitochondria?

    <p>Contains potential energy</p> Signup and view all the answers

    Where does the Citric Acid Cycle (TCA cycle) occur?

    <p>In the mitochondrial matrix</p> Signup and view all the answers

    What is the main function of oxidative phosphorylation?

    <p>To generate ATP using the electron transport chain</p> Signup and view all the answers

    How many ATP molecules are produced directly in glycolysis from one molecule of glucose?

    <p>2 ATP</p> Signup and view all the answers

    Which organelle is responsible for programmed cell death (apoptosis)?

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

    What is the final electron acceptor in the electron transport chain during oxidative phosphorylation?

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

    What is the net ATP yield from one molecule of glucose after both glycolysis and the Citric Acid Cycle (TCA cycle)?

    <p>36 ATP</p> Signup and view all the answers

    What is the function of mitochondria in a cell?

    <p>Respiration and ATP synthesis</p> Signup and view all the answers

    Where is mitochondrial DNA associated within the mitochondria?

    <p>Inner membrane on the matrix side</p> Signup and view all the answers

    What is the primary source of energy production in mitochondria?

    <p>Oxidative phosphorylation</p> Signup and view all the answers

    What is the main function of mitochondrial protein import?

    <p>Protein translocation and folding</p> Signup and view all the answers

    Which part of the mitochondria is responsible for the generation of ATP?

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

    What is the role of mitochondria in apoptosis?

    <p>Programmed cell death</p> Signup and view all the answers

    What can excessive apoptosis lead to?

    <p>Alzheimer's</p> Signup and view all the answers

    Which organelle is responsible for protein transport through the signal sequence at the N terminals?

    <p>Endoplasmic Reticulum</p> Signup and view all the answers

    What is the role of KDEL in protein retention?

    <p>Retention in the Endoplasmic Reticulum</p> Signup and view all the answers

    Which part of the mitochondria contains chaperones to help correct misfolded proteins?

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

    What process involves the return of internalized receptors from endosomes to the plasma membrane?

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

    What is the main function of lysosomes in a cell?

    <p>Digestion of cellular waste</p> Signup and view all the answers

    Where do most proteins in mitochondria come from?

    <p>Cell cytoplasm</p> Signup and view all the answers

    Which organelle is responsible for the degradation of most proteins in the mitochondria?

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

    What is the role of the inner membrane space in mitochondria?

    <p>Aids in protein translocation and folding</p> Signup and view all the answers

    What is the primary function of mitochondrial protein translocation?

    <p>Protein import into mitochondria</p> Signup and view all the answers

    Which organelle is primarily responsible for the fusion and fission processes in cells?

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

    Which process involves the conversion of pyruvate to acetyl CoA?

    <p>Citric Acid Cycle</p> Signup and view all the answers

    Why are proteins in the mitochondria imported from the nucleus?

    <p>To maintain mitochondrial function</p> Signup and view all the answers

    What is the main function of chaperones in the endoplasmic reticulum (ER)?

    <p>Protein folding</p> Signup and view all the answers

    What is the primary function of chaperones in the lumen of the endoplasmic reticulum (ER)?

    <p>Facilitate protein folding</p> Signup and view all the answers

    Which organelle is responsible for programmed cell death?

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

    Which organelle is known as the 'powerhouse of the cell'?

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

    What cellular process can lead to programmed cell death without releasing harmful substances into the surrounding environment?

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

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