The Cell Theory
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Questions and Answers

According to the cell theory, what are the main ideas regarding cells?

  • Cells are not the building blocks of organisms
  • Cells can only be found in animals
  • Cells are the largest units of life
  • All living organisms are composed of cells (correct)

    • True or False: Cells are the smallest units of life.

    True

    What process produces ATP in the mitochondria?

    cellular respiration

    _______ synthesizes proteins, while smooth ER synthesizes lipids.

    <p>Rough ER</p> Signup and view all the answers

    Match the cell organelles with their functions:

    <p>Nucleus = Contains genetic material, controls cell activities Mitochondria = Powerhouse of the cell, produces ATP through cellular respiration Endoplasmic Reticulum (ER) = Rough ER synthesizes proteins, smooth ER synthesizes lipids Golgi Apparatus = Modifies, sorts, and packages proteins and lipids for secretion Lysosomes = Digests waste materials and cellular debris Ribosomes = Site of protein synthesis Cytoplasm = Gel-like substance where organelles are suspended and many cellular processes occur</p> Signup and view all the answers

    Study Notes

    The Cell Theory

    • All living organisms, from unicellular bacteria to multicellular organisms, are composed of cells, which are the basic structural and functional units of life.
    • Cells are the smallest units of life, exhibiting characteristics such as metabolism, growth, reproduction, and response to stimuli.

    Hierarchy of Cells to Organism

    • The hierarchy of cells to organism is: cells -> tissues -> organs -> organ systems -> organism.

    Cell Organelles and Their Functions

    • Nucleus: contains genetic material (DNA) and controls cell activities.
    • Mitochondria: produces ATP through cellular respiration, serving as the powerhouse of the cell.
    • Endoplasmic Reticulum (ER): rough ER synthesizes proteins, while smooth ER synthesizes lipids.
    • Golgi Apparatus: modifies, sorts, and packages proteins and lipids for secretion.
    • Lysosomes: digests waste materials and cellular debris.
    • Ribosomes: site of protein synthesis.
    • Cytoplasm: a gel-like substance where organelles are suspended and many cellular processes occur.

    Key Concept

    • Cells arise from pre-existing cells, refuting the earlier idea of spontaneous generation.

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    Description

    Understand the fundamental principle of biology that explains the properties and functions of cells, including their composition and characteristics.

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