Cell Nucleus Fundamentals B - Lecture Quiz
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Questions and Answers

What is the main function of nucleoporins?

  • Control gene expression
  • Facilitate movement of molecules across the nuclear pores (correct)
  • DNA packaging within the nucleus
  • Regulate cellular metabolism

    • Which of the following is NOT a component of a nucleosome?

  • Histones
  • Non-histone chromosomal proteins
  • Nucleosomes (correct)
  • Chromatin

    • What is the role of Ran in nuclear import and export of proteins?

  • Formation of nucleosomes
  • Regulation of histone modifications
  • Facilitation of movement through nuclear pores
  • Regulation of nuclear transport receptors (correct)

    • What is a key significance of nuclear import signals?

    <p>Recognition by nuclear transport receptors</p> Signup and view all the answers

    Which scientist is associated with the discovery of histones?

    <p>Albrecht Kossel</p> Signup and view all the answers

    What is the function of histones in nucleosome structure?

    <p>Packaging and organizing DNA into nucleosomes</p> Signup and view all the answers

    What is the role of histones in nucleosome structure?

    <p>Facilitate the compaction of DNA</p> Signup and view all the answers

    Which component is responsible for the import and export of proteins in the nucleus?

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

    What is the significance of nuclear import signals?

    <p>Facilitating the movement of proteins into the nucleus</p> Signup and view all the answers

    Which structures trap various proteins and mRNAs, hindering their function in the nucleus?

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

    What do meiosis I and mitosis have in common?

    <p>Both involve DNA synthesis</p> Signup and view all the answers

    Which process does lamin phosphorylation play a significant role in?

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

    Which cellular structure plays a role in ribosome biogenesis?

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

    What is the function of the PML nuclear body?

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

    What is the additional function of Ran-GTP in spindle assembly during mitosis?

    <p>Assembling lamin into a matrixlike network</p> Signup and view all the answers

    Which component of the interphase nucleus is a structural protein?

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

    In T-cell activation, what is NF-AT primarily involved in?

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

    What triggers an increase in the production of lncRNA NEAT1 leading to paraspeckle formation under stress?

    <p>Various cellular stress factors</p> Signup and view all the answers

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