Mitosis and Cell Division
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Questions and Answers

During which phase of the cell cycle does DNA replication occur?

  • S phase (correct)
  • G2 phase
  • G1 phase
  • M phase
  • What is the result of cell division by mitosis?

  • Genetically different cells
  • Cells with double the number of chromosomes
  • Cells with half the number of chromosomes
  • Genetically identical cells (correct)
  • Which stage of mitosis involves the condensation and attachment of chromosomes to spindle fibers?

  • Metaphase
  • Prometaphase
  • Prophase (correct)
  • Anaphase
  • What is the purpose of cytokinesis in the cell cycle?

    <p>Dividing the cytoplasm and cell membrane</p> Signup and view all the answers

    Which stage is specific to plant cells in mitosis?

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

    In a haplontic life cycle, what is the ploidy of the multicellular stage?

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

    What type of life cycle involves multicellular diploid stages and the formation of haploid gametes?

    <p>Diplontic life cycle</p> Signup and view all the answers

    What term is used for the life cycle in plants and many algae that involves two multicellular stages?

    <p>Alternation of generations</p> Signup and view all the answers

    What process must occur to return from a diploid stage to a haploid stage in life cycles involving sexual reproduction?

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

    What is the term used for the process involving growth, asexual reproduction, or sexual reproduction during transitions of form in a biological life cycle?

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

    Who first used the term 'molecular biology' in 1945?

    <p>William Astbury</p> Signup and view all the answers

    Which group of scientists created the double helix model of DNA in 1953?

    <p>Francis Crick, James Watson, Rosalind Franklin</p> Signup and view all the answers

    What is the primary focus of molecular biology?

    <p>Uncovering the molecular basis of biological activity</p> Signup and view all the answers

    Which field covers techniques used to learn about molecular processes for targeting new drugs and diagnosing diseases?

    <p>Molecular medicine</p> Signup and view all the answers

    What did the discovery of the double helix model of DNA lead to?

    <p>Understanding of DNA material in other microorganisms, plants, and animals</p> Signup and view all the answers

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