Introduction to Cells
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Questions and Answers

Which scientists formally articulated the concept of cell theory in 1839?

  • Louis Pasteur
  • Robert Hooke
  • Schleiden and Schwann (correct)
  • Anton van Leeuwenhoek
  • According to the seven major components of cell theory, what is the fundamental unit of structure and function in all living organisms?

  • Cell (correct)
  • Tissue
  • Atom
  • Molecule
  • What is a key limitation of the cell theory as stated in the text?

  • Presence of DNA in prokaryotic cells
  • Structure of viruses (correct)
  • Inability to explain the origin of life
  • Lack of membrane-bound organelles
  • According to the cell theory, where is DNA specifically found in cells?

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

    What does the cell theory propose about metabolism (energy flow) in cells?

    <p>It occurs within cells</p> Signup and view all the answers

    Which statement best describes the origin of new living cells according to cell theory?

    <p>By division from pre-existing cells</p> Signup and view all the answers

    Which aspect of cell theory is contradicted by the existence of prokaryotic cells?

    <p>Presence of well-defined nucleus in every cell</p> Signup and view all the answers

    How do tapetal cells challenge the traditional understanding derived from the cell theory?

    <p>By being multinucleate</p> Signup and view all the answers

    What is a notable characteristic of human Red Blood Cells according to the discussion about limitations of the cell theory?

    <p>They lack nuclei</p> Signup and view all the answers

    According to Schleiden and Schwann, what was considered the functional unit of the body in living organisms?

    <p>A cell with a well-defined nucleus</p> Signup and view all the answers

    How do viruses challenge the concept of the functional unit in living organisms proposed by Schleiden and Schwann?

    <p>Viruses only 'come alive' when hosted by other cells</p> Signup and view all the answers

    What aspect of the origin of the first cell is not addressed by the cell theory?

    <p>How and where the first cell originated</p> Signup and view all the answers

    What stains lightly and contains active DNA?

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

    Which structure is involved in detoxification in liver cells?

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

    Where does oxidative phosphorylation occur during aerobic respiration?

    <p>Mitochondrial matrix</p> Signup and view all the answers

    What cellular structure increases surface area for absorption or secretion of substances?

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

    Which organelle forms polysomes or polyribosomes?

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

    What organelle is responsible for processing enzymes and proteins to be secreted from the cell?

    <p>Golgi apparatus</p> Signup and view all the answers

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