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Introduction to the Cytoskeleton quiz

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  • Which statement best describes an actin filament?
    Actin filaments are the smallest component of the cytoskeleton, composed of thin rods of repeating actin proteins, providing cell shape and movement.
  • What feature is common to all three components of the cytoskeleton?
    They all provide structural support
  • The movement of cilia and flagella is due to the interaction of the cytoskeleton with which structure?
    Microtubules
  • What are the main types of cytoskeletal fibers?
    Microfilaments, intermediate filaments, and microtubules
  • What structure is produced when protein fibers radiate from centrioles?
    The mitotic spindle is produced when protein fibers radiate from centrioles.
  • What are the main functions of the cytoskeleton?
    It provides structural support and facilitates movement
  • What happens to microtubules during anaphase in cell division?
    They shorten to pull chromosomes apart
  • Which cellular structure is not composed of microtubules: cilia, flagella, microvilli, or mitotic spindle?
    Microvilli
  • What are microtubules and what is their role in the cytoskeleton?
    Microtubules are the largest component of the cytoskeleton, composed of tubulin proteins, forming large tubes that provide structural support and facilitate movement.
  • Both cilia and flagella are composed of what type of cytoskeletal component?
    Both cilia and flagella are composed of microtubules.
  • What is a primary function of intermediate filaments?
    Providing mechanical support
  • Which cellular structures are not components of the cytoskeleton?
    Ribosomes
  • Which protein is not a long filament found in the cytoskeleton?
    Hemoglobin
  • What are the three types of protein structures that contribute to the cytoskeleton?
    The three types of protein structures are microfilaments, intermediate filaments, and microtubules.
  • Which cytoskeleton component is involved in cell movement?
    Microtubules
  • Which organelle is not a component of the cytoskeleton?
    Lysosomes
  • What protein fibers help form the framework of structural support for cells?
    Microfilaments, intermediate filaments, and microtubules help form the framework of structural support for cells.
  • What are actin filaments and what role do they play in the cell?
    Actin filaments are the smallest component of the cytoskeleton, composed of actin proteins, providing cell shape and movement.
  • Which structure is made of protein fibers that form the cell’s supporting network?
    The cytoskeleton is made of protein fibers that form the cell’s supporting network.
  • What does dynamic instability refer to in microtubules?
    Rapidly grow and shrink
  • Which is not a function of the cytoskeleton? a) Providing structural support b) Facilitating cell movement c) Conducting photosynthesis d) Assisting in cell division
    c) Conducting photosynthesis
  • What is the role of microfilaments in the cell?
    They are involved in cell movement
  • Which cellular structure has a 9 + 2 arrangement of microtubules?
    Cilia
  • What is the correct function of the cytoskeleton?
    It provides structural support and facilitates movement