Cell Organelles Quiz
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Questions and Answers

What is the primary material of the plasma membrane?

  • Phospholipids (correct)
  • Integral proteins
  • Glycolipids
  • Cholesterol

    • Which organelle provides a suitable medium for reactions occurring in the cytoplasm?

  • Golgi apparatus
  • Mitochondria
  • Matrix (cytosol, cell sap) (correct)
  • Endoplasmic reticulum

    • Where are peripheral proteins found in relation to phospholipids?

  • On the inner or outer bilayer of phospholipids (correct)
  • Present within the bilayer of phospholipids
  • Linked to the proteins (glycolipids)
  • Incorporated into the hydrophobic core

    • What is the envelope of the cell that encloses its cytoplasmic compartments and preserves its shape?

    <p>Cell membrane (plasmalemma)</p> Signup and view all the answers

    What are found to be linked to the proteins on the extracellular surface of the plasma membrane?

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

    Which organelle appears as a colorless watery fluid or semi-fluid substance in between other organelles and inclusions?

    <p>Matrix (cytosol, cell sap)</p> Signup and view all the answers

    What is the approximate thickness of the unit membrane?

    <p>7.5-10 nm</p> Signup and view all the answers

    What is the function of the plasma membrane related to cellular transport?

    <p>It allows selective permeability</p> Signup and view all the answers

    What is the primary material of the light layer in the trilaminar structure of the cell membrane after fixation in osmium tetroxide?

    <p>Non-polar lipid</p> Signup and view all the answers

    Which process requires energy and involves the absorption of molecules by engulfing them, either solid particles or small molecules and ions?

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

    Which organelle is equipped with receptors for performing specific functions when substances like hormones are bound to the receptors?

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

    What is the function of the endoplasmic reticulum related to protein synthesis?

    <p>Synthesizing pro</p> Signup and view all the answers

    What type of molecules are unable to traverse the cell membrane?

    <p>Polar molecules</p> Signup and view all the answers

    Which molecule can freely pass through the cell membrane via passive diffusion?

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

    What is the approximate thickness of each layer of the trilaminar structure of the cell membrane after fixation in osmium tetroxide?

    <p>$2.5$ nm</p> Signup and view all the answers

    What is the primary function of the cytoskeleton within the cell?

    <p>$Structural ext{ } support ext{ } for ext{ } the ext{ } cell$</p> Signup and view all the answers

    Which organelle has been discovered to be present within the bilayer of phospholipids?

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

    What is the primary function of the annulate lamellae within the cell?

    <p>Synthesizing proteins</p> Signup and view all the answers

    Where are glycolipids found in relation to the plasma membrane?

    <p>Linked to the proteins on the extracellular surface</p> Signup and view all the answers

    What is the approximate thickness of each layer of the trilaminar structure of the cell membrane after fixation in osmium tetroxide?

    <p>$2(5 - 1)$ nm</p> Signup and view all the answers

    What type of molecules are unable to traverse the cell membrane?

    <p>Hydrophilic molecules</p> Signup and view all the answers

    What is the primary material of the light layer in the trilaminar structure of the cell membrane after fixation in osmium tetroxide?

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

    What is the approximate thickness of the trilaminar structure of the cell membrane after fixation in osmium tetroxide?

    <p>7.5-10 nm</p> Signup and view all the answers

    What is the primary function of the endoplasmic reticulum within the cell?

    <p>Cellular transport</p> Signup and view all the answers

    Which process requires energy and involves the absorption of molecules by engulfing them, either solid particles or small molecules and ions?

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

    What is the primary material of the light layer in the trilaminar structure of the cell membrane after fixation in osmium tetroxide?

    <p>Non-polar lipid</p> Signup and view all the answers

    Where are peripheral proteins found in relation to phospholipids in the cell membrane?

    <p>In the outer leaflet of the membrane</p> Signup and view all the answers

    Which organelle is equipped with receptors for performing specific functions when substances like hormones are bound to the receptors?

    <p>Plasma membrane</p> Signup and view all the answers

    Study Notes

    Cell Membrane Structure and Function

    • Phospholipids are the primary material of the plasma membrane.
    • The cytoplasm provides a suitable medium for reactions occurring within the cell.
    • Peripheral proteins are found on the surface of the phospholipid bilayer, not embedded within it.
    • The plasma membrane encloses the cytoplasmic compartments and preserves the cell's shape.
    • Glycoproteins are linked to proteins on the extracellular surface of the plasma membrane.
    • The cytosol appears as a colorless watery fluid or semi-fluid substance between other organelles and inclusions.
    • The unit membrane is approximately 7.5nm thick.
    • The plasma membrane regulates cellular transport through selective permeability.
    • The light layer in the trilaminar structure of the cell membrane after fixation in osmium tetroxide is composed of phospholipid heads.
    • Endocytosis is a process that requires energy and involves the absorption of molecules by engulfing them.
    • The plasma membrane is equipped with receptors for specific functions when substances like hormones bind.
    • The endoplasmic reticulum plays a role in protein synthesis.
    • Large polar molecules are unable to traverse the cell membrane.
    • Small, non-polar molecules can freely pass through the cell membrane via passive diffusion.
    • Each layer of the trilaminar structure of the cell membrane after fixation in osmium tetroxide is approximately 2.5nm thick.
    • The cytoskeleton provides structural support and facilitates movement within the cell.
    • The cell membrane has been discovered to contain integral proteins embedded within its phospholipid bilayer.
    • The annulate lamellae function in the transport and assembly of RNA molecules.
    • Glycolipids are found on the extracellular surface of the plasma membrane.
    • The trilaminar structure of the cell membrane after fixation in osmium tetroxide measures approximately 7.5nm thick.
    • Large polar molecules are unable to traverse the cell membrane.
    • The light layer in the trilaminar structure of the cell membrane after fixation in osmium tetroxide is primarily composed of phospholipid heads.
    • The trilaminar structure of the cell membrane after fixation in osmium tetroxide measures approximately 7.5nm thick.
    • The endoplasmic reticulum plays a crucial role in protein synthesis, lipid metabolism, and detoxification.
    • Endocytosis requires energy and involves the absorption of molecules by engulfing them.
    • The light layer in the trilaminar structure of the cell membrane after fixation in osmium tetroxide is primarily composed of phospholipid heads.
    • Peripheral proteins are found on the surface of the phospholipid bilayer, not embedded within it.
    • The plasma membrane is equipped with receptors for specific functions when substances like hormones bind.

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    Description

    Test your knowledge of cell organelles with this quiz covering both membranous and non-membranous organelles, as well as the cytoplasm matrix. Identify organelles such as the cell membrane, endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, mitochondria, and annulate lamellae, and understand the composition and characteristics of the cytoplasm matrix.

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