Cell Biology: Nucleus Introduction
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Cell Biology: Nucleus Introduction

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Questions and Answers

Which of the following structures is responsible for transporting biomolecules between the nucleoplasm and the cytoplasm?

  • Chromatin fibers
  • Nucleoplasmic matrix
  • Nuclear scaffold
  • Nuclear pores (correct)

    • What is the primary protein component of chromatin?

  • Transcription factors
  • Histones (correct)
  • Polymerase chain reaction
  • RNA polymerase

    • Which term refers to the condensed form of chromatin?

  • Chromatid
  • Nucleosome
  • Euchromatin
  • Heterochromatin (correct)

    • What is the site of formation of ribosomal constituents inside the nucleus?

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

    What maintains the nucleus's shape and acts as a framework upon which chromatin is organized?

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

    Which of the following classes of ribosomes contains a long 28 S rRNA chain with 4700 nucleotides?

    <p>Eukaryotic ribosomes</p> Signup and view all the answers

    What is the sedimentation constant of prokaryotic ribosomes?

    <p>70S</p> Signup and view all the answers

    How many ribosomal proteins are present in the small subunit of prokaryotic ribosomes?

    <p>21</p> Signup and view all the answers

    Which type of ribosomes has small 30S and large 50S subunits, together forming a 80S mitoribosome?

    <p>Chloroplast ribosomes</p> Signup and view all the answers

    What is the main role of ribosomes?

    <p>Protein synthesis</p> Signup and view all the answers

    Which type of endoplasmic reticulum is involved in the metabolism of lipids and glycogen?

    <p>Smooth Endoplasmic Reticulum</p> Signup and view all the answers

    What is the diameter range of tubules in the tubular form of endoplasmic reticulum?

    <p>50 to 190 μm</p> Signup and view all the answers

    In which cells is the smooth type of endoplasmic reticulum found abundantly?

    <p>Liver cells</p> Signup and view all the answers

    What is the thickness of the membrane of the endoplasmic reticulum?

    <p>50 to 60 Å</p> Signup and view all the answers

    Which component of the endoplasmic reticulum acts as a passage for the secretory products?

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

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