4-L2
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Questions and Answers

What is the main function of chromatin?

  • Package DNA into a small volume (correct)
  • Store genetic information
  • Help with cell division
  • Facilitate DNA replication
  • What is a nucleosome?

  • DNA segment without histones
  • A type of protein involved in gene expression
  • A bead-like structure consisting of DNA coiled around histone proteins (correct)
  • A type of nucleotide
  • Where is eukaryotic DNA located?

  • Cytoplasm
  • Mitochondria
  • Ribosomes
  • Nucleus (correct)
  • What is the role of histones in DNA organization?

    <p>Package DNA into compact structures</p> Signup and view all the answers

    How is eukaryotic DNA compacted into chromosomes?

    <p>By forming nucleosomes with histones</p> Signup and view all the answers

    What did Watson and Crick suggest about DNA replication?

    <p>Each strand acts as a template for a newly synthesized strand</p> Signup and view all the answers

    Why is chromatin important for mitosis and meiosis?

    <p>To prevent chromosome breakage</p> Signup and view all the answers

    What does a nucleosome consist of?

    <p>A combination of histone proteins and coiled DNA</p> Signup and view all the answers

    What are the main components of chromatin?

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

    What is the repeating structural unit within eukaryotic chromatin?

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

    What is the main structural component of chromatin?

    <p>Double-stranded DNA wrapped around histone proteins</p> Signup and view all the answers

    How many base pairs of DNA wrap around a single nucleosome core?

    <p>160 bp</p> Signup and view all the answers

    What is the function of histone proteins in chromatin?

    <p>Pack long DNA molecules</p> Signup and view all the answers

    When does DNA replication occur in eukaryotic cells?

    <p>During S phase</p> Signup and view all the answers

    What is the significance of a replication fork during DNA replication?

    <p>It separates the two DNA strands</p> Signup and view all the answers

    What is the purpose of replication bubbles during DNA replication?

    <p>To prevent DNA from being attacked by enzymes</p> Signup and view all the answers

    Which phase of the cell cycle is incorrectly assumed to be a resting phase?

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

    What is the main function of the G1 checkpoint in the cell cycle?

    <p>To check for DNA damage and growth signals</p> Signup and view all the answers

    Which type of cells in multicellular organisms undergo regular cell division?

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

    How many pairs of chromosomes do humans have?

    <p>22 pairs of autosomes and 1 pair of sex chromosomes</p> Signup and view all the answers

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