Cell Cycle & Regulation: CMD 114 Qassim University Quiz
19 Questions
3 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What are the first 3 phases of the cell cycle called?

  • M, G1, S
  • S, G2, M
  • G2, M, G1
  • G1, S, G2 (correct)
  • Which cell type has a cell cycle of less than 20 minutes?

  • Liver cells
  • Mature nerve cells
  • Skin cells
  • Embryo cells (correct)
  • Which type of cells divide frequently throughout life with a 12-24 hour cycle?

  • Mature nerve cells
  • Embryo cells
  • Liver cells
  • Skin cells (correct)
  • Which type of cells do not divide at all after maturity and remain permanently in G0 phase?

    <p>Mature nerve cells</p> Signup and view all the answers

    What are cyclins and cyclin-dependent kinases known as in the regulation of the cell cycle?

    <p>Positive regulators</p> Signup and view all the answers

    Which proteins act as negative regulators of the cell cycle and suppressors of cancer?

    <p>P53 and Rb</p> Signup and view all the answers

    What is the main biochemical event occurring during the S phase of the cell cycle?

    <p>DNA synthesis</p> Signup and view all the answers

    What is the importance of checkpoints in the cell cycle?

    <p>To stimulate DNA repair</p> Signup and view all the answers

    Which type of genes are involved in suppressing cancer, especially by stimulating DNA repair, cell cycle, and apoptosis?

    <p>Tumor suppressor genes</p> Signup and view all the answers

    What is the critical role of a multicellular organism in coordinating cell division?

    <p>Coordinating timing of cell division across different tissues &amp; organs</p> Signup and view all the answers

    During which phase does the cell replicate its nuclear DNA?

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

    At which checkpoint does the cell determine if DNA synthesis has completed correctly?

    <p>G2/M checkpoint</p> Signup and view all the answers

    What is the longest phase in the cell cycle?

    <p>G1 phase</p> Signup and view all the answers

    Which phase marks the generation of bipolar mitotic spindles, segregation of sister chromatids, and cell division?

    <p>M phase</p> Signup and view all the answers

    What happens during the G0 phase of the cell cycle?

    <p>Cell stays dormant until instructed to divide</p> Signup and view all the answers

    Which phase involves RNA and protein synthesis but no DNA synthesis?

    <p>G1 phase</p> Signup and view all the answers

    Which checkpoint checks if all chromosomes are attached to the spindle and if sister chromatids can separate correctly?

    <p>Spindle checkpoint</p> Signup and view all the answers

    What is the purpose of checkpoint control systems in the cell cycle?

    <p>(External) (Internal) Regulation of DNA integrity</p> Signup and view all the answers

    What occurs during the S Phase of the cell cycle?

    <p>The cell replicates its nuclear DNA.</p> Signup and view all the answers

    Use Quizgecko on...
    Browser
    Browser