Cell Structures & Functions Definition Quiz
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Questions and Answers

Which type of cell has a definite nucleus and membrane-bound organelles?

  • Unicellular organisms
  • Prokaryotic cells
  • Eukaryotic cells (correct)
  • Bacteria
  • What type of cell division occurs in prokaryotic cells?

  • Cellular respiration
  • Mitosis
  • Meiosis
  • Binary fission (correct)
  • Which organelle is absent in prokaryotic cells but present in eukaryotic cells?

  • Chloroplasts
  • Ribosomes
  • Mitochondria (correct)
  • Cell membrane
  • What distinguishes eukaryotic cells from prokaryotic cells in terms of organization?

    <p>Unicellular vs. multicellular</p> Signup and view all the answers

    Which type of cell lacks membrane-bound organelles?

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

    Who is credited with the discovery of the cell and the usage of the term 'cell'?

    <p>Robert Hooke</p> Signup and view all the answers

    What magnification did Anton van Leeuwenhoek achieve with his simple microscope?

    <p>275X</p> Signup and view all the answers

    Which scientists proposed that all organisms are composed of cells?

    <p>Theodore Schwann</p> Signup and view all the answers

    What type of cell did Robert Hooke observe in his cork sample?

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

    Who proposed that 'the cell is the basic unit of life'?

    <p>Theodore Schwann</p> Signup and view all the answers

    Which scientist observed 'tiny boxes that look like the rooms in a monastery' under the microscope?

    <p>Anton van Leeuwenhoek</p> Signup and view all the answers

    What is the main function of microfilaments?

    <p>Cell movement and cytokinesis</p> Signup and view all the answers

    Which organelle contains a spherical body for the synthesis of protein?

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

    Which cell structure is responsible for forming the spindle fibers during cell division?

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

    What do intermediate filaments provide within a cell?

    <p>Support and strength</p> Signup and view all the answers

    What is the main purpose of flagella within cells?

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

    Which organelle controls the movement of materials in and out of the nucleus?

    <p>Nuclear Envelope</p> Signup and view all the answers

    What is the function of the Golgi apparatus?

    <p>Packaging and modifying proteins</p> Signup and view all the answers

    Which scientist made a significant contribution to microbiology by developing microscopes that could magnify up to 300 times?

    <p>Antonie van Leeuwenhoek</p> Signup and view all the answers

    What is the main function of mitochondria in a cell?

    <p>Energy production</p> Signup and view all the answers

    Which organelle is responsible for detoxifying harmful substances in a cell?

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

    Which type of epithelium is characterized by tall, columnar cells with nuclei located at the base of each cell?

    <p>Columnar epithelium</p> Signup and view all the answers

    What is the primary function of centrioles in animal cells?

    <p>Cell division</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 is the function of the cell membrane?

    <p>Selects materials that pass through it</p> Signup and view all the answers

    What is the main function of ribosomes?

    <p>Site for protein synthesis</p> Signup and view all the answers

    Which organelle contains digestive enzymes and is known as the 'Suicide Sac'?

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

    What is the main function of the Golgi Apparatus?

    <p>Processing and packaging</p> Signup and view all the answers

    Which organelle is described as a system of membranous tubules and sacs, known as the 'Circulatory System of the Cell'?

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

    What type of organelle has its own DNA and can replicate independently by dividing?

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

    Which structure in a cell is described as a complex network of interlinking filaments or tubules, acting as the 'Cell Skeleton'?

    <p>'Cytoskeleton'</p> Signup and view all the answers

    'Sol' and 'Gel' refer to which part of the cell?

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

    'Phospholipid Bilayer' is a characteristic feature of which cell component?

    <p>'Cell Membrane'</p> Signup and view all the answers

    Study Notes

    Cell Structure and Function

    • Cell: the structural unit of life that performs all life processes

    Cell Types

    • Prokaryotic Cell
      • No definite nucleus ("False Nucleus")
      • Few structures
      • Mitochondria: none
      • Ribosomes: 70S
      • Chloroplasts: none
      • Cell Division: Binary Fission
      • Organization: Unicellular
    • Eukaryotic Cell
      • Definite nucleus ("True Nucleus")
      • Highly structured by membranes
      • Mitochondria: present
      • Ribosomes: 80S
      • Chloroplasts: present in plants and algae
      • Cell Division: Mitosis and Meiosis
      • Organization: Multicellular

    Cell Components

    • Microfilaments: contractile, made of actin, for cell movement and cytokinesis
    • Microtubules: rigid, hollow tubes, made of tubulin, for maintaining cell shape and forming centrioles
    • Intermediate Filaments: provide strength and support

    Centrioles and Centrosomes

    • Centrioles: organizing centers for microtubules, contain two bundles of microtubules at right angles
    • Centrosomes: form spindle fibers for chromosome separation, house centrioles

    Flagella and Cilia

    • Flagella: long, thread-like, fewer in number, for cell movement
    • Cilia: short, hair-like, numerous, for cell movement

    Nucleus

    • Normally the largest organelle
    • Nuclear Envelope: double membrane with many pores, controls movement of materials
    • Nucleolus: spherical body in the nucleus for protein synthesis
    • Chromosomes: houses genes (DNA), hereditary material

    Cell Structures and Functions

    • All eukaryotic cells have a nucleus, except for red blood cells that lose their nuclei as they mature

    Prokaryotic vs. Eukaryotic Cells

    • Prokaryotic cells: bacteria
    • Eukaryotic cells: plants, animals, algae, fungi, protists

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    Description

    Test your knowledge on the definition and examples of cells, the structural units of life that perform all life processes. Identify various cell types such as animal cells, plant cells, bacterial cells, and more.

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