Cell Biology: Meiosis and Mitosis Quiz
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Questions and Answers

What is one of the main benefits of meiosis?

  • Creation of new gene combinations (correct)
  • Replication of all DNA
  • Production of identical daughter cells
  • Direct cell repair
  • What happens to the chromosome number during the first division of meiosis?

  • It triples
  • It is reduced by half (correct)
  • It is doubled
  • It is unchanged
  • Which phase of meiosis involves the crossing over of chromosomes?

  • Metaphase I
  • Telophase II
  • Anaphase II
  • Prophase I (correct)
  • After completing meiosis, how many chromosomes do each of the four daughter cells contain if the mother cell originally had 6 chromosomes?

    <p>3 chromosomes</p> Signup and view all the answers

    What is one function of the mitotic spindle during cell division?

    <p>To facilitate chromosome alignment</p> Signup and view all the answers

    What role does H1 play in chromatin structure?

    <p>Promotes DNA condensation</p> Signup and view all the answers

    Which type of microtubules is responsible for connecting with the centrioles during mitosis?

    <p>Polar microtubules</p> Signup and view all the answers

    During which phase of mitosis are the chromosomes arranged at the equator of the cell?

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

    What is the main function of kinetochores in cell division?

    <p>To connect chromosomes to microtubules</p> Signup and view all the answers

    Which of the following best describes the composition of the mitotic spindle?

    <p>Three types of microtubules including polar, kinetochore, and astral</p> Signup and view all the answers

    What happens to the chromosome number in daughter cells after mitosis if the mother cell has 6 chromosomes?

    <p>Remains 6</p> Signup and view all the answers

    How much reduction in DNA length occurs due to the formation of a solenoid compared to the nucleosome?

    <p>Six times</p> Signup and view all the answers

    What is the size range of loop-like structures formed during the tertiary level of chromatin organization?

    <p>20 - 80,000 nucleotides</p> Signup and view all the answers

    Which statement accurately describes polyten chromosomes?

    <p>They are thicker due to repeated replication.</p> Signup and view all the answers

    What is the primary function of chromosomal activity during prophase I of meiosis?

    <p>To synthesize mRNA for egg protein production.</p> Signup and view all the answers

    How does the replication rate of DNA differ between prokaryotes and eukaryotes?

    <p>Prokaryotes have a replication rate of 500 bp/s.</p> Signup and view all the answers

    In what phase of meiosis do lamp brush chromosomes form?

    <p>Prophase I.</p> Signup and view all the answers

    What is the result of transcription in the flow of information?

    <p>RNA production from DNA.</p> Signup and view all the answers

    Which feature distinguishes chromatin during interphase compared to metaphase?

    <p>Interphase chromatin is more accessible for transcription.</p> Signup and view all the answers

    Which type of chromosomes are characterized by being transcriptionally active and found in amphibians?

    <p>Lampbrush chromosomes.</p> Signup and view all the answers

    What characterizes the mitotic spindle's function during cell division?

    <p>It helps segregate chromatid pairs.</p> Signup and view all the answers

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