Cell Division and Mitosis Quiz

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Questions and Answers

What is the main function of most cell division?

  • To produce genetically identical daughter cells
  • To distribute genetic material to daughter cells (correct)
  • To package DNA molecules into chromosomes
  • To pass DNA accurately to the next generation

What is the role of cell division in single-celled organisms?

  • To undergo embryonic development
  • To pass DNA accurately to the next generation
  • To produce new organisms (correct)
  • To renew and repair

What is the function of cell division in fully grown multicellular eukaryotes?

  • To undergo embryonic development
  • To pass DNA accurately to the next generation
  • To renew and repair (correct)
  • To produce new organisms

What is a genome?

<p>All the DNA in a cell (B)</p> Signup and view all the answers

What is the packaging form of DNA molecules in a cell?

<p>Chromosomes (B)</p> Signup and view all the answers

How many genes can a DNA molecule of a chromosome carry?

<p>A few thousand genes (A)</p> Signup and view all the answers

What distinguishes the genome of prokaryotic cells from eukaryotic cells?

<p>The number of DNA molecules (B)</p> Signup and view all the answers

During cell division, the two sister chromatids of each duplicated chromosome separate and move into how many nuclei?

<p>Two (C)</p> Signup and view all the answers

What is the narrow 'waist' of the duplicated chromosome called?

<p>Centromere (B)</p> Signup and view all the answers

Which phase of the cell cycle involves cell growth and copying of chromosomes in preparation for cell division?

<p>S phase (C)</p> Signup and view all the answers

What is the complex of DNA and protein that makes up eukaryotic chromosomes called?

<p>Chromatin (C)</p> Signup and view all the answers

What is the division of the genetic material in the nucleus called?

<p>Mitosis (A)</p> Signup and view all the answers

What is the variation of cell division that produces gametes called?

<p>Meiosis (B)</p> Signup and view all the answers

How many phases does interphase have?

<p>Three (D)</p> Signup and view all the answers

How many stages is mitosis conventionally broken down into?

<p>Five (A)</p> Signup and view all the answers

What is the division of the cytoplasm called?

<p>Cytokinesis (C)</p> Signup and view all the answers

How many chromosomes do Somatic and Gamete cells have?

<p>46 and 23</p> Signup and view all the answers

What is the function of meiosis?

<p>The function of meiosis is to produce gametes with half the number of chromosomes as the parent cell.</p> Signup and view all the answers

What are the five stages of mitosis?

<p>The five stages of mitosis are prophase, prometaphase, metaphase, anaphase, and telophase.</p> Signup and view all the answers

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Study Notes

Cell Division and Genetic Continuity

  • The ability of organisms to produce more of their own kind is a characteristic that distinguishes living things from nonliving matter.
  • Cell division plays several important roles in life, including the reproduction of single-celled organisms, embryonic development in multicellular eukaryotes, and renewal and repair in fully grown multicellular eukaryotes.

Cellular Organization of Genetic Material

  • A cell's genome consists of all its DNA, which can be a single DNA molecule (in prokaryotic cells) or multiple DNA molecules (in eukaryotic cells).
  • DNA molecules in a cell are packaged into chromosomes, each carrying several hundred to a few thousand genes.

Chromosomes and Cell Division

  • Eukaryotic chromosomes consist of chromatin, a complex of DNA and protein that condenses during cell division.
  • Every eukaryotic species has a characteristic number of chromosomes in each cell nucleus, with somatic cells having two sets and gametes having half as many.
  • During cell division, DNA is replicated, and chromosomes condense, with each duplicated chromosome having two sister chromatids attached by cohesins.

Phases of the Cell Cycle

  • The cell cycle consists of two main phases: mitotic (M) phase (mitosis and cytokinesis) and interphase (cell growth and copying of chromosomes in preparation for cell division).
  • Interphase can be divided into three phases: G1 phase (cell growth), S phase (chromosome duplication), and G2 phase (cell growth).

Mitosis

  • Mitosis consists of five stages: prophase, prometaphase, metaphase, anaphase, and telophase.
  • During mitosis, the two sister chromatids of each duplicated chromosome separate and move into two nuclei, becoming chromosomes.

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