Rough Endoplasmic Reticulum Structure and Function
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Rough Endoplasmic Reticulum Structure and Function

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Questions and Answers

What characterizes the rough endoplasmic reticulum (RER)?

  • Absence of membrane sheets called cisternae
  • Lack of ribosomes in its structure
  • Presence of membrane-bound ribosomes (correct)
  • Synthesis of lipids instead of proteins

    • Why are ribosomes not a stable part of the RER's structure?

  • They are permanent fixtures of the membrane
  • They do not play a role in protein synthesis
  • They are constantly being bound and released from the membrane (correct)
  • They are only found in other organelles

    • What is the main function of the rough endoplasmic reticulum in cells?

  • Generating ATP for energy
  • Assisting with cell division
  • Storing genetic material
  • Producing secreted proteins (correct)

    • What distinguishes the RER morphologically?

    <p>Flattened-like membrane sheets called cisternae</p> Signup and view all the answers

    Which process involves separating very fine insoluble solids from a liquid?

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

    In which process are grains separated from their stalks by beating them?

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

    Which method is used to manually separate stones from grains of rice?

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

    What is the purpose of churning as described in the text?

    <p>Separate very fine insoluble solids from a liquid</p> Signup and view all the answers

    In the context of winnowing, what happens to the lighter solids (husks) when separated from the heavier solids (grains)?

    <p>They are carried by wind and form a separate heap</p> Signup and view all the answers

    How does handpicking help in distinguishing a stone from a grain of rice?

    <p>By singling out stones that are noticeably distinct from rice grains</p> Signup and view all the answers

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