Cell Biology Quiz on Membrane Dynamics
47 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 molecule crosses the membrane most easily by simple diffusion?

  • H2O
  • Amino acid
  • CO2 (correct)
  • Ca+2

    • Which statement about receptor-mediated endocytosis is FALSE?

  • Clathrin binds directly to membrane receptors. (correct)
  • A triskelion is composed of three large and three small subunits.
  • Multivesicular bodies are derived from endosomes.
  • Some receptors are recycled while others are degraded.

    • What effect does decreasing cholesterol have on membrane fluidity?

  • Increases fluidity (correct)
  • Increases membrane rigidity
  • No effect on fluidity
  • Decreases fluidity

    • Where does the assembly of collagen molecules into fibers occur?

    <p>Rough endoplasmic reticulum</p> Signup and view all the answers

    Which protein functions as an integral membrane protein participating in cell-matrix adhesion?

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

    Which statement about the origin and evolution of cells is correct?

    <p>The first biological membrane had specialized regions for signaling.</p> Signup and view all the answers

    Regarding the extracellular matrix (ECM), which statement is correct?

    <p>Fibronectin and elastin are components of the ECM.</p> Signup and view all the answers

    Which component does NOT increase membrane fluidity?

    <p>Increase in long fatty acid chains</p> Signup and view all the answers

    Which statement about biological membranes is true?

    <p>They exhibit very different structures in various organelles or cell types.</p> Signup and view all the answers

    During receptor-mediated endocytosis, where does the receptor and ligand separate?

    <p>In a low pH endosomal compartment.</p> Signup and view all the answers

    What mechanism does Na+ use to move from a more concentrated environment to a less concentrated one?

    <p>Ion channels.</p> Signup and view all the answers

    Which mechanism does Na+ utilize to move from a less concentrated environment to a more concentrated one?

    <p>Na+/K+ pump.</p> Signup and view all the answers

    Which statement regarding endocytosis is true?

    <p>Receptor-mediated endocytosis allows specific incorporation of molecules into vesicles.</p> Signup and view all the answers

    Which statement about the extracellular matrix (ECM) is true?

    <p>Elastin protein is part of elastic fibers.</p> Signup and view all the answers

    What is a typical property of collagen fibers?

    <p>They provide mechanical resistance.</p> Signup and view all the answers

    What is the function of the glycocalyx in relation to the plasma membrane?

    <p>It is a collection of carbohydrates attached to the external face of the plasma membrane.</p> Signup and view all the answers

    Which statement about membrane permeability is incorrect?

    <p>Proteins are not capable of lateral movement in the membrane.</p> Signup and view all the answers

    Which of the following proteins is NOT typically found in the extracellular matrix?

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

    Which cell type is specialized for the process of phagocytosis?

    <p>Macrophages and neutrophils</p> Signup and view all the answers

    Which statement regarding viruses is TRUE?

    <p>They contain genetic material but can replicate only within host cells.</p> Signup and view all the answers

    What might be the consequence of mice lacking a collagen gene?

    <p>Brittle bones.</p> Signup and view all the answers

    Which of the following is a FALSE statement regarding the transport of micromolecules across membranes?

    <p>Ionic channels permit the passage of all ions, regardless of charge.</p> Signup and view all the answers

    Which statement about clathrin is FALSE?

    <p>It functions primarily in exocytosis.</p> Signup and view all the answers

    What characteristic defines membrane lipids?

    <p>They have a hydrophilic head and one or two hydrophobic tails.</p> Signup and view all the answers

    Which statement is true regarding the extracellular matrix (ECM)?

    <p>Fibronectin and elastin are proteins present in the ECM.</p> Signup and view all the answers

    Which statement about the asymmetry of cell membranes is FALSE?

    <p>Phosphatidylserine is mainly located on the outer face of the plasma membrane.</p> Signup and view all the answers

    Regarding the glucose transporter, which statements are correct?

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

    What is required for the exocytosis of vesicles?

    <p>It is regulated and requires ATP.</p> Signup and view all the answers

    Which statement is true about the properties of cell membranes?

    <p>Membrane semipermeability allows lipids to move laterally with ease.</p> Signup and view all the answers

    Which of the following is NOT a component of the extracellular matrix?

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

    What does the presence of sugar residues on the membrane indicate?

    <p>They primarily serve as recognition sites.</p> Signup and view all the answers

    What is the process called when a cell emits pseudopodia to surround and engulf a solid particle?

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

    Which statement regarding caveolae-mediated endocytosis is TRUE?

    <p>Caveolae play a role in cholesterol homeostasis.</p> Signup and view all the answers

    Which of the following statements about endocytosis is FALSE?

    <p>Phagocytosis occurs in all cell types.</p> Signup and view all the answers

    Endocytosis exclusively incorporates which type of material?

    <p>Both solid and liquid</p> Signup and view all the answers

    What is the probability that Guillermo has 47 chromosomes given the context of Down syndrome in his family?

    <p>Guillermo has 47 chromosomes.</p> Signup and view all the answers

    Based on her family history, what is the probability that the woman with a sister who died of Tay-Sachs is a carrier?

    <p>1/2</p> Signup and view all the answers

    How many chromosomes would Antia's father have had if he died from SCA36?

    <p>46 chromosomes.</p> Signup and view all the answers

    Which of the following statements about Tay-Sachs disease is TRUE?

    <p>It is an autosomal recessive condition.</p> Signup and view all the answers

    What is true about sickle cell anemia?

    <p>It has pleiotropic effects on various organs and tissues.</p> Signup and view all the answers

    Which statement accurately describes nonsense mutations?

    <p>They introduce a stop codon in place of a regular codon.</p> Signup and view all the answers

    Which of the following genetic alterations is NOT associated with cancer induction?

    <p>Inversions that activate oncogenes.</p> Signup and view all the answers

    Which chromosomal formula is likely to result in the most severe phenotype due to a deletion?

    <p>46,XX,del(X)(q23)</p> Signup and view all the answers

    What genetic phenomenon is represented by a child with muscular dystrophy showing a deletion not found in either parent?

    <p>Germline mutation.</p> Signup and view all the answers

    How will a mutation in the alpha-globin gene affect hemoglobin?

    <p>It will cause the red blood cells to form a sickle shape.</p> Signup and view all the answers

    What is the pattern of inheritance of sickle cell anemia?

    <p>Autosomal recessive inheritance.</p> Signup and view all the answers

    What effect does gene amplification have in cancers?

    <p>It leads to an increase in oncogene products.</p> Signup and view all the answers

    Study Notes

    No specific topic provided. Please provide the text or questions.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Biología Humana: Citología y Genética 2021 Examen (PDF)

    Description

    Test your knowledge on cell membranes, diffusion, and endocytosis with this comprehensive quiz. You'll explore the various mechanisms involved in cell-matrix adhesion, as well as the roles of cholesterol and the extracellular matrix. Perfect for students studying cell biology or related fields.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser