CBSE Sample Papers Class 11 Physics
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Questions and Answers

What is the primary function of the cytoskeleton?

  • Providing nutrients to the cell
  • Facilitating energy production
  • Storing waste products
  • Maintaining shape and mechanical resistance (correct)

    • Which structure emerges from the basal bodies in cells?

  • Cilia (correct)
  • Ribosomes
  • Vacuoles
  • Mitochondria

    • What distinguishes eukaryotic flagella from prokaryotic flagella?

  • Eukaryotic flagella do not facilitate cell movement
  • Eukaryotic flagella are smaller than prokaryotic flagella
  • Eukaryotic flagella have a core called axoneme (correct)
  • Eukaryotic flagella lack microtubules

    • What is the composition of the centrioles in the centrosome?

    <p>9 triplets of peripheral fibrils of tubulin protein</p> Signup and view all the answers

    What is the primary function of vacuoles in cells?

    <p>Storing food and nutrients</p> Signup and view all the answers

    How are the central microtubules of cilia and flagella arranged?

    <p>Parallel to the peripheral microtubules</p> Signup and view all the answers

    What role do centrioles play during cell division?

    <p>Giving rise to spindle fibres</p> Signup and view all the answers

    What structural component connects the peripheral microtubules in the axoneme?

    <p>Radial spokes</p> Signup and view all the answers

    What is the primary role of the nucleus in a cell?

    <p>Storage of genetic information</p> Signup and view all the answers

    Which organelle is responsible for protein synthesis?

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

    What function do vacuoles serve in plant cells?

    <p>Storing nutrients and waste products</p> Signup and view all the answers

    Which organelle is primarily involved in energy production?

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

    What is the main function of the plasma membrane?

    <p>Regulating what enters and exits the cell</p> Signup and view all the answers

    Which cellular structure is involved in the modification and packaging of proteins?

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

    What is the role of cytoskeleton in a cell?

    <p>Providing shape and support</p> Signup and view all the answers

    Cilia and flagella are primarily involved in which function?

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

    Which organelle is NOT typically found in animal cells?

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

    What is the primary function of the endoplasmic reticulum?

    <p>Synthesis and transport of proteins and lipids</p> Signup and view all the answers

    Which organelle is the largest in the cell?

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

    Which of the following is NOT a membrane-bound organelle?

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

    What is the main function of lysosomes?

    <p>Digestion and waste removal</p> Signup and view all the answers

    Which of the following organelles is involved in energy production?

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

    Which organelles are primarily responsible for the storage of substances in the cell?

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

    What role do chloroplasts play in plant cells?

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

    Which of these organelles helps in the processing and packaging of proteins?

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

    What defines a membrane-bound organelle?

    <p>An organelle surrounded by a lipid bilayer membrane</p> Signup and view all the answers

    What are organelles?

    <p>Small structures within a cell that perform specific functions.</p> Signup and view all the answers

    Which of the following statements about organelles is incorrect?

    <p>Organelles can only be found in plant cells.</p> Signup and view all the answers

    Which organelle is responsible for protein synthesis?

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

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

    <p>To store genetic information.</p> Signup and view all the answers

    What role do lysosomes play within a cell?

    <p>They break down waste and cellular debris.</p> Signup and view all the answers

    Which of the following organelles is not found in animal cells?

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

    What is the main function of the endoplasmic reticulum in a cell?

    <p>To synthesize proteins and lipids.</p> Signup and view all the answers

    Which organelle is often referred to as the powerhouse of the cell?

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

    What is the general sentiment expressed by the comments regarding the information provided?

    <p>The information is very helpful and appreciated.</p> Signup and view all the answers

    Which of the following comments specifically mentions holiday homework?

    <p>sambavi: 'Yes it helped me very much in my holiday homeworks.'</p> Signup and view all the answers

    Which user expressed that the information was especially helpful during a lockdown?

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

    Which comment reflects a general appreciation of the application mentioned?

    <p>It is very helpful for students.</p> Signup and view all the answers

    What issue is not addressed in any of the comments?

    <p>Problems faced while using the information.</p> Signup and view all the answers

    Which user stated that the information helped in 'learning the way' as well?

    <p>Aditya Gautam</p> Signup and view all the answers

    Which user mentioned that the app is very good without specifying its usefulness?

    <p>Aravind A An Unsung</p> Signup and view all the answers

    What is a common theme in the comments regarding the utility of the information?

    <p>It is beneficial for completing assignments.</p> Signup and view all the answers

    Study Notes

    Cell Organelles Overview

    • Cells are the basic structural and functional units of living organisms.
    • Their primary functions include maintaining shape, providing mechanical resistance, and aiding in cellular movement during cytokinesis.

    Cilia and Flagella

    • Cilia: Hair-like projections on the cell surface that function to move the cell or the surrounding fluids.
    • Flagella: Longer structures compared to cilia, also involved in cell movement.
    • Eukaryotic flagella have a distinct structural composition from prokaryotic flagella.
    • The axoneme, the core of cilia and flagella, consists of nine pairs of peripheral microtubules and a central set of microtubules.
    • Central microtubules are interconnected by a bridge, while peripheral pairs connect to a central sheath via radial spokes.

    Centrosome and Centrioles

    • The centrosome consists of two orthogonal centrioles.
    • Each centriole is made up of nine peripheral fibrils of tubulin protein arranged in triplets.
    • Centrioles form basal bodies for cilia and flagella and create spindle fibers during cell division.

    Vacuoles

    • Vacuoles: Irregularly shaped, fluid-filled organelles that serve as storage bubbles within cells.
    • They store food, nutrients, and waste products, playing a protective role in keeping the cell uncontaminated by harmful substances.
    • Other membrane-bound organelles include the nucleus, chloroplasts, and lysosomes.

    Nucleus

    • The nucleus is the largest organelle within the cell, housing genetic material.

    Importance of Understanding Cell Organelles

    • Knowledge of cell organelles is crucial for comprehending their various functions and the overall cellular process.
    • This understanding forms the foundation for further studies in biology and related subjects.

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    Cell Organelles - Types, Structure and their Functions PDF

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    Prepare for your Class 11 Physics exams with these comprehensive CBSE sample papers. This quiz covers vital concepts and problem-solving techniques essential for mastering the subject. Test your knowledge and boost your confidence ahead of the exams!

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