Class 9 Biology: Cell Functions and Components
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Questions and Answers

What is the function of the cell?

  • To protect the body from foreign invaders
  • To provide structure and support for the body
  • To transport oxygen to the body
  • To produce energy for the body (correct)

    • What is the main component of a cell membrane?

  • Carbohydrates
  • Nucleic acids
  • Lipids (correct)
  • Proteins

    • Where does photosynthesis occur within the cell?

  • Endoplasmic reticulum
  • Golgi apparatus
  • Mitochondria
  • Chloroplasts (correct)

    • What is the function of the nucleus in a cell?

    <p>Control of cell activities and contains genetic material</p> Signup and view all the answers

    Which organelle is responsible for synthesizing proteins within the cell?

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

    What is the function of ribosomes in a cell?

    <p>Protein synthesis</p> Signup and view all the answers

    Which cellular structure is involved in cellular respiration to generate ATP?

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

    What is the main function of the cytoskeleton in a cell?

    <p>Cellular movement and support</p> Signup and view all the answers

    Study Notes

    Cell Function and Structure

    • The cell is the basic structural and functional unit of life, responsible for carrying out various cellular activities.

    Cell Membrane

    • The main component of a cell membrane is a phospholipid bilayer, which provides a barrier between the cell's internal environment and the external environment.

    Photosynthesis

    • Photosynthesis occurs in the chloroplasts, organelles found in plant cells, where light energy is converted into chemical energy.

    Nucleus

    • The nucleus is the control center of the cell, responsible for storing genetic information in the form of DNA and regulating cellular activities.

    Protein Synthesis

    • The ribosomes are responsible for synthesizing proteins within the cell, using mRNA as a template to assemble amino acids into polypeptide chains.

    Cellular Respiration

    • The mitochondria are the cellular structures involved in cellular respiration, generating ATP (adenosine triphosphate) through the process of cellular respiration.

    Cytoskeleton

    • The main function of the cytoskeleton is to provide structural support, shape, and mechanical stability to the cell, as well as facilitating cellular movement and division.

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    Description

    Test your knowledge of cell functions and components with these questions about the main function of a cell, the components of a cell membrane, the location of photosynthesis within a cell, and the function of the cell nucleus.

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