Nuclear Envelope Quiz
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Questions and Answers

What is the function of the nuclear lamina?

  • Regulates gene expression
  • Facilitates the transport of ribosomes
  • Stores genetic information
  • Provides structural support for the nucleus and helps to organize the nuclear envelope and chromatin (correct)
  • What are the components of the nuclear lamina?

  • Transcription factors
  • Lamin A, lamin B, and lamin C (correct)
  • Histone proteins
  • Ribosomal RNA
  • What is the basic unit of chromatin?

  • Histone protein
  • Chromosome
  • Nucleosome (correct)
  • Ribosome
  • How is chromatin further organized beyond nucleosomes?

    <p>Into higher-order structures such as chromatin fibers and chromosomes</p> Signup and view all the answers

    What is the function of the nucleolus?

    <p>Site of ribosome biogenesis</p> Signup and view all the answers

    What type of RNA is found in the nucleolus?

    <p>Ribosomal RNA (rRNA)</p> Signup and view all the answers

    What is the role of the nucleolus in protein synthesis?

    <p>Essential for making ribosomes and synthesizing proteins</p> Signup and view all the answers

    What is the function of chromatin organization?

    <p>Important for gene regulation</p> Signup and view all the answers

    What is the composition of chromatin?

    <p>DNA and histone proteins</p> Signup and view all the answers

    What is the role of the nuclear lamina in nuclear import and export?

    <p>Plays a role in nuclear import and export</p> Signup and view all the answers

    What is the function of the nuclear envelope?

    <p>Separates the nucleus from the cytoplasm</p> Signup and view all the answers

    What is the role of the nuclear lamina in anchoring chromatin?

    <p>Helps to anchor chromatin to the nuclear envelope</p> Signup and view all the answers

    What is the function of the nuclear envelope?

    <p>Regulates the passage of substances into and out of the nucleus and protects the genetic material from damage</p> Signup and view all the answers

    Which part of the nuclear envelope is continuous with the rough endoplasmic reticulum (RER)?

    <p>Outer nuclear membrane</p> Signup and view all the answers

    What is the function of the nuclear pore complex?

    <p>Forms tiny holes in the nuclear envelope to allow molecules to pass between the nucleus and the cytoplasm</p> Signup and view all the answers

    What is the nuclear lamina?

    <p>A network of protein filaments that lines the inner surface of the nuclear envelope</p> Signup and view all the answers

    What are nuclear pores made up of?

    <p>Over 30 different proteins</p> Signup and view all the answers

    What regulates the size of the nuclear pore opening?

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

    What is the primary role of the inner nuclear membrane?

    <p>Continuous with the nuclear lamina</p> Signup and view all the answers

    Which structure is continuous with the outer nuclear membrane?

    <p>Rough endoplasmic reticulum (RER)</p> Signup and view all the answers

    What is the function of the nuclear pore?

    <p>Allows molecules to pass between the nucleus and the cytoplasm</p> Signup and view all the answers

    What regulates the passage of substances into and out of the nucleus?

    <p>Nuclear envelope</p> Signup and view all the answers

    What lines the inner surface of the nuclear envelope?

    <p>Nuclear lamina</p> Signup and view all the answers

    What is the main function of the outer nuclear membrane?

    <p>Continuous with the rough endoplasmic reticulum (RER)</p> Signup and view all the answers

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