Chapter 12 Part 1: Organelle Functions Quiz
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Questions and Answers

Which of the following organelles is responsible for protein synthesis?

  • Golgi Complex
  • Nucleus
  • Ribosome (correct)
  • Endoplasmic Reticulum

    • Which mechanism is responsible for the transport of proteins from the cytosol to the endoplasmic reticulum (ER)?

  • Transmembrane Transport (correct)
  • Facilitated Diffusion
  • Vesicular Transport
  • Gated Transport

    • Which organelle is responsible for the modification and sorting of proteins?

  • Ribosome
  • Mitochondrion
  • Nucleus
  • Golgi Complex (correct)

    • Which organelle is responsible for the digestion of intracellular materials?

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

    Which mechanism is responsible for the transport of proteins and RNA from the nucleus to the cytosol and vice versa?

    <p>Gated Transport</p> Signup and view all the answers

    What is the primary significance of the 'topologically equivalent' compartments in the context of vesicular transport?

    <p>Proteins can be directly sorted from one compartment to another without crossing a membrane.</p> Signup and view all the answers

    What is the primary function of the nuclear pore complex in regulating the movement of molecules across the nuclear membrane?

    <p>The nuclear pore complex contains aqueous passages that allow for the passive diffusion of molecules up to 60,000 Daltons in size.</p> Signup and view all the answers

    Which of the following is the best explanation for the directional transport of molecules across the nuclear membrane, as described by the Ran-GTPase cycle?

    <p>The location of Ran-GAP and Ran-GEF outside and inside the nucleus, respectively, creates an asymmetric distribution of Ran-GTP and Ran-GDP that drives directional transport.</p> Signup and view all the answers

    Which of the following pieces of evidence best supports the endosymbiotic theory of mitochondrial origin?

    <p>The inner membrane of mitochondria is structurally and functionally similar to the plasma membrane of bacteria.</p> Signup and view all the answers

    Why is it significant that mitochondria do not synthesize most of their own proteins, despite having their own ribosomes?

    <p>The cell maintains control over the production of mitochondrial proteins, ensuring the mitochondria remain dependent on the eukaryotic host cell.</p> Signup and view all the answers

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