CH 3: The Cell Cycle
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Questions and Answers

What is the primary purpose of the cell cycle?

  • To maintain cellular homeostasis
  • To repair damaged cellular components
  • To generate energy for the cell
  • To facilitate cell growth and reproduction (correct)

    • During which phase of the cell cycle do chromosomes get duplicated?

  • G2 Phase
  • G1 Phase
  • S Phase (correct)
  • Prophase of Mitosis

    • What happens to the DNA during interphase?

  • DNA is actively transcribed and translated
  • DNA is loosely packed and dispersed throughout the nucleus (correct)
  • DNA is tightly packed and condensed
  • DNA is degraded and recycled

    • What is the role of the G1 phase in the cell cycle?

    <p>Cellular contents are duplicated, excluding the chromosomes</p> Signup and view all the answers

    During which phase of the cell cycle is the cell ready to enter mitosis?

    <p>G2 Phase</p> Signup and view all the answers

    What factor influences a cell's ability to acquire nutrients and dispose of waste effectively?

    <p>Surface area to volume ratio</p> Signup and view all the answers

    Why is it important that each new cell has the correct amount of genetic information after the cell divides?

    <p>To preserve the integrity of the organism</p> Signup and view all the answers

    What is the primary reason a cell undergoes division?

    <p>To maintain an effective surface area to volume ratio</p> Signup and view all the answers

    What percentage of the cell cycle does Interphase take up?

    <p>90%</p> Signup and view all the answers

    Which phase involves the condensing of chromosomes and the formation of spindle fibers?

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

    What happens to the chromatids during Anaphase?

    <p>They are pulled apart and moved to opposite poles of the cell</p> Signup and view all the answers

    What is the main function of the mitotic phase?

    <p>To divide the cell into two daughter cells with identical genetic material</p> Signup and view all the answers

    What occurs during Telophase?

    <p>The nuclear membranes reform around each set of chromosomes at the poles</p> Signup and view all the answers

    What is the final stage of the mitotic phase?

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

    Which phase of the mitotic phase involves chromosomes aligning at the cell's equator?

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

    What happens to the chromosomes during the S phase of interphase?

    <p>The chromosomes are duplicated, resulting in two sister chromatids held together by a centromere.</p> Signup and view all the answers

    What is the primary purpose of the G2 phase of interphase?

    <p>To continue cell growth and produce new proteins.</p> Signup and view all the answers

    What is the main difference between the G1 and G2 phases of interphase?

    <p>The G1 phase involves cell growth and protein production, while the G2 phase prepares the cell for mitosis.</p> Signup and view all the answers

    What is the role of the surface area to volume ratio in the cell cycle?

    <p>It impacts the cell's ability to acquire nutrients and dispose of waste effectively.</p> Signup and view all the answers

    What is the main function of interphase?

    <p>To prepare the cell for division.</p> Signup and view all the answers

    What is the main problem a cell faces when its volume increases faster than its surface area?

    <p>Decreased surface area to volume ratio</p> Signup and view all the answers

    What happens to the DNA during the G1 phase of interphase?

    <p>The DNA is loosely packed and dispersed throughout the nucleus.</p> Signup and view all the answers

    What is the final stage of interphase before the cell enters mitosis?

    <p>The G2 phase.</p> Signup and view all the answers

    Which event characterizes the Prophase stage of the mitotic phase?

    <p>Condensation of chromosomes</p> Signup and view all the answers

    What is the outcome of Cytokinesis in the cell cycle process?

    <p>Division of the cytoplasm</p> Signup and view all the answers

    Why is Interphase crucial in the cell cycle process?

    <p>For preparation for division</p> Signup and view all the answers

    What signifies the beginning of Telophase during the mitotic phase?

    <p>Formation of nuclear membranes</p> Signup and view all the answers

    What happens to chromatids during Anaphase?

    <p>They are pulled apart and move to opposite poles.</p> Signup and view all the answers

    In what phase do the spindle fibers start to form in the mitotic phase?

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

    Why is it essential for a cell to maintain an effective surface area to volume ratio?

    <p>For efficient material exchange with its environment</p> Signup and view all the answers

    During which phase of the cell cycle does the cell produce new proteins and ensure that each new cell will have the correct amount of genetic information after the cell divides?

    <p>G2 Phase</p> Signup and view all the answers

    Which phase of the cell cycle involves the loosening of chromatin and the dispersion of DNA throughout the nucleus to allow for efficient DNA replication and transcription?

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

    Which phase of the cell cycle involves the alignment of chromosomes at the cell's equator, followed by the separation of sister chromatids?

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

    During which phase of the cell cycle does the centrosome move to opposite ends of the cell, and the nuclear envelope breaks down, allowing spindle fibers to attach to the kinetochores of the chromosomes?

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

    Which phase of the cell cycle involves the reformation of the nuclear envelope, the decondensation of chromosomes, and the cytokinesis process?

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

    Which phase of the cell cycle involves the duplication of each chromosome, resulting in two sister chromatids held together by a centromere, ensuring that each new cell will have the correct amount of genetic information after the cell divides?

    <p>S Phase</p> Signup and view all the answers

    Which phase of the cell cycle involves the condensing of chromosomes and the formation of spindle fibers?

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

    During which phase of the mitotic phase do chromatids become daughter chromosomes?

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

    What is the primary reason for spindle fibers to form during mitosis?

    <p>To separate chromosomes during cell division</p> Signup and view all the answers

    What is the main function of cytokinesis in the cell cycle process?

    <p>To divide the cytoplasm</p> Signup and view all the answers

    Why does a cell need to maintain an effective surface area to volume ratio?

    <p>To enhance material exchange with the environment</p> Signup and view all the answers

    What is the purpose of nuclear membranes reforming around chromosomes in Telophase?

    <p>To protect and organize genetic material</p> Signup and view all the answers

    What happens to the nuclear envelope during Prophase in the mitotic phase?

    <p>It disappears</p> Signup and view all the answers

    Why do chromosomes need to align at the cell's equator during Metaphase?

    <p>To ensure equal separation of genetic material</p> Signup and view all the answers

    What is the significance of each new cell having identical genetic material after division?

    <p>To ensure proper functioning and heredity</p> Signup and view all the answers

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