Class 9 Science Chapter 6 Cell Division and Organelles Quiz
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Questions and Answers

What is the process by which a cell divides into two daughter cells?

  • Mitosis
  • Meiosis
  • Cytokinesis (correct)
  • Binary fission

    • Which of the following is not a characteristic of a prokaryotic cell?

  • Contains membrane-bound organelles (correct)
  • Has circular DNA
  • Lacks a true nucleus
  • Single-celled organism

    • Which organelle is responsible for intracellular digestion and waste removal in a cell?

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

    • What is the function of ribosomes in a cell?

    <p>Energy production</p> Signup and view all the answers

    Explain the difference between mitosis and meiosis.

    <p>Mitosis results in two identical daughter cells, while meiosis results in four genetically different daughter cells.</p> Signup and view all the answers

    Describe the structure and function of the chloroplast.

    <p>The chloroplast is a double-membrane organelle containing chlorophyll, responsible for photosynthesis in plant cells.</p> Signup and view all the answers

    What is the role of the endoplasmic reticulum in a cell?

    <p>The endoplasmic reticulum is involved in the synthesis, folding, modification, and transport of proteins and lipids.</p> Signup and view all the answers

    Explain the difference between prokaryotic and eukaryotic cells.

    <p>Prokaryotic cells lack a true nucleus and membrane-bound organelles, while eukaryotic cells have a true nucleus and membrane-bound organelles.</p> Signup and view all the answers

    How does the structure of a prokaryotic cell differ from that of a eukaryotic cell?

    <p>Prokaryotic cells lack a true nucleus and membrane-bound organelles, while eukaryotic cells have a defined nucleus and membrane-bound organelles.</p> Signup and view all the answers

    What is the significance of meiosis in the process of cell division?

    <p>Meiosis is significant in producing gametes with half the number of chromosomes, ensuring genetic diversity through recombination, and contributing to the continuity of a species.</p> Signup and view all the answers

    Explain the role of the Golgi apparatus in a cell's functioning.

    <p>The Golgi apparatus is involved in modifying, sorting, and packaging proteins and lipids for secretion or for use within the cell.</p> Signup and view all the answers

    How does the process of endocytosis contribute to a cell's functioning?

    <p>Endocytosis allows cells to take in substances from the external environment by engulfing them through the cell membrane, contributing to nutrient uptake and cellular communication.</p> Signup and view all the answers

    Study Notes

    Cell Division

    • Cell division occurs through processes called mitosis and meiosis.
    • Mitosis results in two genetically identical daughter cells.
    • Meiosis produces four genetically diverse daughter cells, essential for sexual reproduction.

    Prokaryotic Cells

    • Prokaryotic cells lack a nucleus and membrane-bound organelles.
    • They typically have a simpler structure than eukaryotic cells.
    • Characteristics include a single circular DNA chromosome and ribosomes that float freely in the cytoplasm.

    Organelles and Functions

    • Lysosomes are responsible for intracellular digestion and waste removal.
    • Ribosomes synthesize proteins by translating messenger RNA into polypeptide chains.

    Mitosis vs. Meiosis

    • Mitosis involves one division, producing diploid cells, while meiosis includes two divisions, producing haploid gametes.
    • Mitosis is for growth and tissue repair; meiosis is crucial for genetic diversity and reproduction.

    Chloroplast Structure and Function

    • Chloroplasts contain thylakoids stacked in grana and a stroma rich in enzymes.
    • They are responsible for photosynthesis, converting sunlight into energy and producing glucose.

    Endoplasmic Reticulum (ER)

    • The ER is involved in protein and lipid synthesis.
    • Rough ER is studded with ribosomes for protein production; smooth ER functions in lipid metabolism and detoxification.

    Differences Between Cell Types

    • Prokaryotic cells are smaller, simpler, and lack a defined nucleus.
    • Eukaryotic cells have a nucleus, more complex organelles, and can be unicellular or multicellular.

    Meiosis Significance

    • Meiosis is vital for maintaining genetic variation in populations and for the formation of gametes in sexual reproduction.

    Golgi Apparatus Role

    • The Golgi apparatus processes, modifies, and packages proteins and lipids for secretion or use within the cell.

    Endocytosis Contribution

    • Endocytosis enables cells to intake materials by engulfing them in vesicles, facilitating nutrient absorption and communication.

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    Description

    Test your knowledge about cell division and organelles with this quiz. Answer questions about the process of cell division, characteristics of prokaryotic cells, the function of ribosomes, and the organelle responsible for intracellular digestion and waste removal.

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