Cell Division and Genetic Material Quiz
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Questions and Answers

What is the most remarkable aspect of cell division?

  • The coiling of chromatin to form distinct chromosomes
  • The presence of 20,000-25,000 genes in a single DNA molecule
  • The characteristic number of chromosomes in each cell's nucleus
  • The distribution of identical genetic material to two daughter cells (correct)

    • What is the main gene-carrying structure of a prokaryotic cell?

  • Chromatin
  • Chromosomes
  • Threadlike gene-carrying structure
  • Diffused mass of long thin fibers (correct)

    • What is the endowment of DNA in a cell referred to as?

  • Chromatin
  • Sister chromatids
  • Chromosomes
  • Genome (correct)

    • What happens to chromatin as the cell prepares to divide?

    <p>It coils up to form tight, distinct chromosomes</p> Signup and view all the answers

    What is the term for the duplicated form of each chromosome consisting of two copies?

    <p>Sister chromatids</p> Signup and view all the answers

    How long is the DNA molecule in a human cell?

    <p>Nearly 2 meters in length</p> Signup and view all the answers

    What is the correct order of events during the first portion of the mitotic phase?

    <p>Chromatin tightly coils, nuclear envelope disintegrates, mitotic spindle forms</p> Signup and view all the answers

    How many chromatids are produced when a human cell has 46 duplicated chromosomes?

    <p>92 chromatids</p> Signup and view all the answers

    In which stage of mitosis do liberated chromosomes begin moving to the opposite ends?

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

    In human somatic cells, how many chromosomes are present?

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

    During which phase does the nuclear envelope reappear and chromosomes become less condensed?

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

    What is the purpose of meiosis in sex cells or gametes?

    <p>To reduce the number of chromosomes by half</p> Signup and view all the answers

    What occurs during cytokinesis in animal cells?

    <p>Physical separation of cytoplasmic components into two daughter cells</p> Signup and view all the answers

    What is characteristic of the second portion of the mitotic phase known as cytokinesis?

    <p>Physical separation of cytoplasmic components into two daughter cells</p> Signup and view all the answers

    What occurs during prometaphase in mitosis?

    <p>Nuclear envelope fragments and chromosomes become clearer</p> Signup and view all the answers

    What is a characteristic of sex cells or gametes in humans?

    <p>They contain 23 chromosomes and are haploid cells</p> Signup and view all the answers

    What is the significance of the characteristic number of chromosomes in eukaryotic species?

    <p>It influences the process of cell division</p> Signup and view all the answers

    What is the main function of chromatin in a eukaryotic cell?

    <p>To store and organize genetic information</p> Signup and view all the answers

    What distinguishes the chromosomes of a eukaryotic cell from those of a prokaryotic cell?

    <p>Number and packaging</p> Signup and view all the answers

    How does the coiling up of chromatin during cell division contribute to the process?

    <p>It ensures the accurate segregation of genetic material</p> Signup and view all the answers

    What is the primary reason for the duplication of chromosomes before cell division in eukaryotic cells?

    <p>To ensure each daughter cell receives an identical set of genetic material</p> Signup and view all the answers

    What is the effect of having 20,000-25,000 genes in a single DNA molecule in human cells?

    <p>It increases the complexity of gene regulation in human cells</p> Signup and view all the answers

    What is the term for the process in which the sister chromatids of a duplicated chromosome separate from each other?

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

    How many chromosomes are present in human somatic cells?

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

    What is characteristic of the second portion of the mitotic phase known as cytokinesis?

    <p>Physical separation of cytoplasmic components</p> Signup and view all the answers

    What occurs during prometaphase in mitosis?

    <p>Nuclear envelope fragments</p> Signup and view all the answers

    What is characteristic of sex cells or gametes in humans?

    <p>Haploids with 23 chromosomes</p> Signup and view all the answers

    In which stage of mitosis do liberated chromosomes begin moving to the opposite ends?

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

    What is the term for the duplicated form of each chromosome consisting of two copies?

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

    What occurs during cytokinesis in animal cells?

    <p>Physical separation of cytoplasmic components</p> Signup and view all the answers

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