Cell Biology 1st Year: Cell Definition and Functions
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Questions and Answers

Which kingdom consists of organisms that obtain nutrients through absorption?

  • Kingdom Monera
  • Kingdom Protista
  • Kingdom Fungi (correct)
  • Kingdom Plantae
  • What is the basis for the classifications of the mentioned kingdoms?

  • Movement and cell type
  • Nutrition and cell organization (correct)
  • Cell organization and respiration
  • Respiration and reproduction
  • Which kingdom is composed of unicellular prokaryotic organisms?

  • Kingdom Monera (correct)
  • Kingdom Fungi
  • Kingdom Plantae
  • Kingdom Protista
  • What is the study of cells and the organelles they contain called?

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

    Who first formulated the cell theory in biology?

    <p>Matthias Schleiden</p> Signup and view all the answers

    What is the fundamental building block shared among all living organisms?

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

    Who observed the cell walls of cork and coined the term 'cell' to describe their appearance?

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

    Which classification system categorizes living organisms into five main groups including Kingdom Monera and Kingdom Plantae?

    <p>Five-kingdom classification</p> Signup and view all the answers

    Who constructed his own microscopes and utilized them to document various microscopic structures including spermatozoa, numerous protists, and blood cells?

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

    What is the smallest structurally and functionally viable entity that possesses distinctive characteristics such as assimilation and self-reproduction?

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

    Which component of the glycocalyx is primarily responsible for cell recognition and interaction?

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

    What percentage of the plasma membrane's chemical composition consists of lipids?

    <p>43%</p> Signup and view all the answers

    In the fluid mosaic model of membrane structure, what remains the core of the membrane?

    <p>Lipid bilayer</p> Signup and view all the answers

    Which type of lipid helps regulate the fluidity and stability of the membrane?

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

    Where are glycolipids found in the plasma membrane?

    <p>On the extracellular side</p> Signup and view all the answers

    Which of the following is NOT a function of the plasma membrane?

    <p>Synthesizing ATP for the cell</p> Signup and view all the answers

    What is the primary component of the plasma membrane?

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

    What is the extracellular material that mediates cell–cell and cell–substratum interactions, and provides mechanical protection to cells?

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

    What term describes the asymmetrical nature of the plasma membrane due to the existence of glycocalyx on its outer surface?

    <p>Glycocalyx enigma</p> Signup and view all the answers

    What is the typical thickness range of the plasma membrane?

    <p>8 to 12 nanometers (nm)</p> Signup and view all the answers

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