Cell Biology Quiz
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Questions and Answers

Which organelle is responsible for cellular respiration?

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

    • What is the function of the cell membrane?

  • Storage of genetic material
  • Regulation of substances entering and leaving the cell (correct)
  • Generation of energy
  • Synthesis of proteins

    • Which of the following is not a component of the cytoplasm?

  • Cell wall (correct)
  • Cytosol
  • Cytoskeleton
  • Organelles

    • Which cell organelle is responsible for protein synthesis?

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

    What is the primary function of the nucleus?

    <p>Genetic regulation</p> Signup and view all the answers

    What does the slope of a velocity-time graph represent?

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

    A body is moving with a constant velocity of 5 m/s. What is its acceleration?

    <p>0 m/s²</p> Signup and view all the answers

    If a car travels 100 meters in 20 seconds with a uniform velocity, what is its speed?

    <p>5 m/s</p> Signup and view all the answers

    Which of the following is a scalar quantity?

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

    What is the SI unit of charge?

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

    If a car accelerates from rest at a rate of $2 , \text{m/s}^2$ for 10 seconds, what is its final velocity?

    <p>20 m/s</p> Signup and view all the answers

    Which of the following statements is true about electric charge?

    <p>Positive and negative charges attract each other</p> Signup and view all the answers

    What is the electric field intensity at a point due to a positive charge?

    <p>Directed toward the charge</p> Signup and view all the answers

    What happens to the electric potential energy of a system of two unlike charges when they are brought closer together?

    <p>It decreases</p> Signup and view all the answers

    In which direction does an electric field line point?

    <p>Away from positive charges and towards negative charges</p> Signup and view all the answers

    What is the electric field inside a conductor in electrostatic equilibrium?

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

    Which of the following is NOT a function of the smooth endoplasmic reticulum?

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

    What is the function of the nucleolus?

    <p>Synthesis of ribosomal RNA (rRNA)</p> Signup and view all the answers

    Which organelle is responsible for cellular respiration?

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

    Which of the following is NOT a component of the endomembrane system?

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

    Which organelle contains digestive enzymes for breaking down waste materials?

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

    Which of the following is NOT a type of plastid?

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

    What is the relationship between velocity and acceleration in uniformly accelerated motion?

    <p>Directly proportional</p> Signup and view all the answers

    Which of the following equations represents uniform motion?

    <p>$s = vt$</p> Signup and view all the answers

    A car travels at a speed of 20 m/s for 10 seconds. What is its acceleration?

    <p>20 m/s²</p> Signup and view all the answers

    What is the acceleration of an object in free fall near the surface of the Earth?

    <p>9.8 m/s² downward</p> Signup and view all the answers

    Which of the following is true about the velocity-time graph of an object moving with constant acceleration?

    <p>It is a straight line</p> Signup and view all the answers

    Which of the following statements is true about electric charge?

    <p>Charge is conserved in a closed system</p> Signup and view all the answers

    What is the direction of the electric field due to a positive charge?

    <p>Radially outward</p> Signup and view all the answers

    What happens to the electric potential energy of a system of two like charges when they are brought closer together?

    <p>It increases</p> Signup and view all the answers

    What is the SI unit of electric potential?

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

    What is the electric field between two parallel plates if the distance between them is increased?

    <p>It decreases</p> Signup and view all the answers

    Study Notes

    Chapter 3: Electric Field and Charge

    • Electric dipole: consists of one positive and one negative charge
    • Conductors: have free electrons, electric field inside is zero, and electric potential is constant
    • Electric field lines: outside a charged conductor, they are perpendicular to the surface
    • Electric potential: decreases in the direction of increasing electric field
    • Electric potential energy: depends on the path taken by the charge, and is a scalar quantity

    Cell Biology

    • Cellular organelles:
      • Mitochondria: responsible for cellular respiration
      • Ribosome: responsible for protein synthesis
      • Golgi apparatus: responsible for packaging and modification of proteins
      • Lysosome: responsible for intracellular digestion
      • Nucleus: responsible for storing genetic material
      • Endoplasmic reticulum: responsible for lipid synthesis
      • Cytoskeleton: responsible for cellular locomotion and structural support
      • Vacuole: responsible for storage of nutrients and waste products
    • Cell membrane: regulates the entry and exit of substances in and out of the cell
    • Cytoplasm: responsible for cellular metabolism and transportation

    Motion

    • Uniform motion: velocity is constant
    • Non-uniform motion: velocity is not constant
    • Displacement: distance from the initial to the final position
    • Velocity: rate of change of displacement
    • Acceleration: rate of change of velocity
    • Uniformly accelerated motion: acceleration is constant
    • Equations of motion:
      • Displacement: s = ut + (1/2)at²
      • Velocity: v = u + at
      • Acceleration: a = Δv / Δt

    Electric Field

    • Electric field: a region around a charge where another charge experiences a force
    • Electric field intensity: the force per unit charge
    • Electric field lines: imaginary lines that emerge from positive charges and enter negative charges
    • Electric potential: the potential energy per unit charge
    • Electric potential energy: the energy an object has due to its position in an electric field

    Electric Potential

    • Electric potential: a scalar quantity
    • Electric potential energy: depends on the path taken by the charge
    • Electric potential and electric potential energy: directly proportional

    Conductor and Insulator

    • Conductors: allow the flow of electric charge
    • Insulators: do not allow the flow of electric charge
    • Electric field inside a conductor: zero
    • Electric field inside an insulator: not zero

    Plant and Animal Cells

    • Plant cells: have a cell wall, chloroplasts, and vacuoles
    • Animal cells: lack a cell wall, have centrioles, and lack chloroplasts
    • Cell wall: provides mechanical support and protection
    • Chloroplast: responsible for photosynthesis

    Other

    • Coulomb's Law: the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them

    • Electric dipole: a system of two equal and opposite charges### Physics

    • An object in free fall near the surface of the Earth has an acceleration of approximately 9.8 m/s² downward.

    • The acceleration of a car that starts from rest and reaches a speed of 20 m/s in 10 seconds is 2 m/s².

    • Uniform motion is represented by the equation s = vt.

    • The area under a velocity-time graph represents displacement.

    • Speed is a scalar quantity, while displacement is a vector quantity.

    • The electric potential at a point in an electric field where the electric field is zero is minimum.

    Electric Charges and Fields

    • The electric field at a point due to a negative charge is directed toward the charge.
    • The electric field at a point due to a positive charge is directed away from the charge.
    • Coulomb's law describes the force between two point charges.
    • The electric potential energy of a system of two like charges increases when they are moved apart.
    • The electric potential energy of a system of two unlike charges decreases when they are moved apart.

    Cell Biology

    • The mitochondria is responsible for the synthesis of ATP through cellular respiration.
    • The cytoskeleton is responsible for cellular locomotion and structural support.
    • The nucleus is responsible for storing genetic material and regulating cell activities.
    • Lysosomes are responsible for breaking down excess or worn-out cell parts.
    • Chloroplasts in plant cells are responsible for photosynthesis.

    Other Key Facts

    • The SI unit of charge is the Coulomb.
    • The SI unit of electric potential is the Volt.
    • Conductors allow the flow of electric charge, while insulators do not.
    • The primary function of ribosomes is protein synthesis.
    • Peroxisomes are responsible for detoxifying harmful substances in the cell.
    • Vacuoles are responsible for storing nutrients and waste products.

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    Test your knowledge of cell structure and function with these questions about cellular respiration, cell membranes, cytoplasm, and organelles.

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