Biology: Cell Structure - Nucleus
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Questions and Answers

Which organelle is responsible for the synthesis of lipids and various carbohydrates?

  • Smooth endoplasmic reticulum (correct)
  • Mitochondria
  • Golgi apparatus
  • Nucleus

    • What provides the cytoplasm and the cell with their structure?

  • Golgi apparatus
  • Cytoskeleton (correct)
  • Endoplasmic reticulum
  • Nucleus

    • Where are dangerous chemicals detoxified within the cell?

  • Mitochondria
  • Smooth endoplasmic reticulum
  • Golgi apparatus
  • Rough endoplasmic reticulum (correct)

    • Which organelle is continuous with the nuclear membrane?

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

    Where are various products transported from one portion of the cell to another?

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

    What is the function of Golgi apparatus in a cell?

    <p>Packaging and modifying proteins</p> Signup and view all the answers

    What is the primary function of the nucleolus?

    <p>To synthesize and assemble ribosomes</p> Signup and view all the answers

    What is the primary difference between euchromatin and heterochromatin?

    <p>Euchromatin is loosely packed and metabolically active, while heterochromatin is tightly packed and relatively inactive.</p> Signup and view all the answers

    Which of the following statements about the cytoplasm is accurate?

    <p>The cytoplasm is the space between the nucleus and the cell membrane, filled with cytosol and organelles.</p> Signup and view all the answers

    What is the primary role of ribosomes in the cell?

    <p>To serve as the site of protein synthesis</p> Signup and view all the answers

    Which of the following statements about the nuclear membrane is correct?

    <p>The inner membrane of the nuclear membrane is firmly attached to clumps of euchromatin.</p> Signup and view all the answers

    What is the primary function of the nucleoplasm?

    <p>To serve as a fluid environment for the nucleolus and chromatin</p> Signup and view all the answers

    What is the primary function of lysosomes within a cell?

    <p>To break down and recycle cellular components and materials taken up from outside the cell</p> Signup and view all the answers

    Which of the following statements about peroxisomes is true?

    <p>Peroxisomes contain enzymes that break down hydrogen peroxide into water and oxygen, acting as detoxifiers</p> Signup and view all the answers

    What is the common structural feature shared by cilia and flagella?

    <p>They have a 9+2 arrangement of microtubules, with nine peripheral pairs surrounding two central microtubules</p> Signup and view all the answers

    Which of the following statements about cilia and flagella is true?

    <p>Cilia are more numerous on the cell surface than flagella</p> Signup and view all the answers

    What is the process called when lysosomes break down old cellular organelles within the cell?

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

    What is the nickname given to lysosomes due to their role in breaking down old cellular components?

    <p>Suicide bags</p> Signup and view all the answers

    What is the typical size range of the nucleus in a eukaryotic cell?

    <p>4-10 m in diameter</p> Signup and view all the answers

    What is the main function of the nucleolus within the nucleus?

    <p>To produce ribosomes</p> Signup and view all the answers

    Which of the following is NOT a component of the nuclear envelope?

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

    What is the function of the nuclear pores in the nuclear envelope?

    <p>To allow the passage of certain molecules in and out of the nucleus</p> Signup and view all the answers

    Which of the following is true about the relationship between the nuclear envelope and the endoplasmic reticulum?

    <p>The outer membrane of the nuclear envelope is occasionally continuous with the endoplasmic reticulum</p> Signup and view all the answers

    Why do mature mammalian red blood cells (RBCs) lack a nucleus?

    <p>Both b and c</p> Signup and view all the answers

    What is the main function of the Golgi apparatus in the cell?

    <p>Forming lysosomes</p> Signup and view all the answers

    Where is ribosomal RNA (rRNA) manufactured in the cell?

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

    What is the function of ribosomes attached to the rough endoplasmic reticulum?

    <p>Synthesizing proteins for export from the cell</p> Signup and view all the answers

    How are mitochondria structurally different from other organelles in the cell?

    <p>They have a double membrane structure with cristae</p> Signup and view all the answers

    What determines the number of Golgi apparatus bodies in a cell?

    <p>The activity level of the cell</p> Signup and view all the answers

    Which organelle is responsible for transporting material from the endoplasmic reticulum to the Golgi apparatus?

    <p>Transport vesicles</p> Signup and view all the answers

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