Bacterial and Eukaryotic Cytoskeleton Quiz
27 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which of the following is NOT a major role of microtubules in cells?

  • Regulating gene expression (correct)
  • Participating in cell division (mitosis)
  • Facilitating intracellular transport
  • Maintaining cell shape and polarity
  • Which of the following is NOT a role of actin microfilaments in cells?

  • Cell movements and locomotion
  • Cytoplasmic streaming
  • Contractility and cytokinesis
  • Facilitating protein transport (correct)
  • The dynamic instability of microtubules, where they rapidly grow and shrink, is explained by which concept?

  • Crosslinking
  • Treadmilling (correct)
  • Severing
  • Capping
  • Which of the following is a structural feature of microfilaments found in lamellipodia?

    <p>Branched filaments</p> Signup and view all the answers

    Which of the following proteins is involved in promoting the growth of microtubules?

    <p>Growth promoting proteins</p> Signup and view all the answers

    Which of the following statements about membrane organization is correct?

    <p>Spatial organization of rafts is determined by their association with the cytoskeleton.</p> Signup and view all the answers

    Which of the following statements about membrane fluidity is correct?

    <p>Liquid disordered and liquid ordered states refer to the packing of phospholipids in the membrane.</p> Signup and view all the answers

    Which of the following is NOT a primary function of membrane proteins?

    <p>Synthesizing lipids for the membrane bilayer.</p> Signup and view all the answers

    Which of the following statements about the membrane bilayer is correct?

    <p>The lipid bilayer creates an impermeable barrier to the passive diffusion of most molecules.</p> Signup and view all the answers

    Which of the following is NOT a component of the fluid mosaic model of the cell membrane?

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

    Which of the following processes involves the SNARE proteins in the membrane?

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

    Which of the following is a primary function of microtubules within cells?

    <p>Maintaining cell polarity and forming cilia and flagella</p> Signup and view all the answers

    Which of the following statements about microfilaments is correct?

    <p>They are involved in cell motility, lamellipodia, and filopodia formation.</p> Signup and view all the answers

    What is the primary function of intermediate filaments within cells?

    <p>Providing structural support and withstanding tensile forces</p> Signup and view all the answers

    Which of the following statements about linker proteins is correct?

    <p>They connect microtubules to microfilaments and intermediate filaments.</p> Signup and view all the answers

    Which of the following statements accurately describes the relationship between the different cytoskeletal components?

    <p>Microtubules provide compressive strength, microfilaments generate tension, and intermediate filaments are elastic and withstand tensile forces.</p> Signup and view all the answers

    Which of the following statements about the composition of cytoskeletal components is correct?

    <p>All of the above statements are correct.</p> Signup and view all the answers

    What is the primary function of microtubule-associated proteins (MAPs) such as Tau?

    <p>Facilitate the formation of long, stable microtubule bundles</p> Signup and view all the answers

    Which of the following statements about actin filaments is correct?

    <p>They exhibit plus-end growth and are polarized structures</p> Signup and view all the answers

    What is the role of the Arp2/3 complex in actin dynamics?

    <p>It promotes the nucleation of new branching growth along existing filaments</p> Signup and view all the answers

    Which of the following Rho GTPases is associated with the formation of filopodia?

    <p>Cdc42</p> Signup and view all the answers

    What is the primary function of intermediate filaments (IFs) in animal cells?

    <p>Provide structural support and bear tension in tissues</p> Signup and view all the answers

    What is the primary role of stathmin/Op18 in regulating microtubule dynamics?

    <p>It binds to and sequesters tubulin heterodimers</p> Signup and view all the answers

    Which of the following actin-binding proteins is responsible for crosslinking adjacent microfilaments that cross?

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

    What is the primary function of katanin in regulating microtubule dynamics?

    <p>It severs microtubules, leading to their disassembly</p> Signup and view all the answers

    Which of the following statements about microtubule dynamics is correct?

    <p>Microtubules exhibit plus-end growth and minus-end anchoring to the MTOC</p> Signup and view all the answers

    What is the primary function of thymosin β4 in regulating actin dynamics?

    <p>It binds and sequesters free G-actin monomers, limiting F-actin growth</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Browser