Cell Cycle Regulation
18 Questions
0 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 is the average duration of the cell cycle in rapidly dividing human cells?

  • 24 hours (correct)
  • 48 hours
  • 12 hours
  • 36 hours
  • What is the approximate duration of the G1 phase in rapidly dividing human cells?

  • 12 hours
  • 6 hours
  • 15 hours
  • 9 hours (correct)
  • What type of cells can spend their entire lifetime in the G0 phase?

  • Epithelial cells
  • Muscle cells
  • Stem cells
  • Cortical neurons (correct)
  • What is the approximate duration of the M phase in rapidly dividing human cells?

    <p>half an hour</p> Signup and view all the answers

    What factors control the timing of events in the cell cycle?

    <p>Both internal and external mechanisms</p> Signup and view all the answers

    In which type of cells is the cell cycle duration highly variable?

    <p>Cells of a single organism</p> Signup and view all the answers

    What is the primary function of cyclin-dependent kinases (Cdks) in the cell cycle?

    <p>To promote progress to the next phase</p> Signup and view all the answers

    During which phase of the cell cycle are the cyclin proteins that were active in the previous stage degraded?

    <p>After the cell moves to the next stage</p> Signup and view all the answers

    What is the correlation between cyclin accumulation and the three major cell cycle checkpoints?

    <p>Direct correlation</p> Signup and view all the answers

    What triggers the increase in concentration of cyclin proteins?

    <p>Both external and internal signals</p> Signup and view all the answers

    What is the purpose of the internally controlled checkpoints in the cell cycle?

    <p>To halt the cycle if there is an issue</p> Signup and view all the answers

    How many cyclin proteins are involved in the regulation of the cell cycle?

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

    What happens to cell division when there is a lack of human growth hormone?

    <p>It is inhibited</p> Signup and view all the answers

    Why does a cell divide as it grows in size?

    <p>To increase its surface-to-volume ratio</p> Signup and view all the answers

    What is the purpose of cell cycle checkpoints?

    <p>To ensure proper chromosome duplication and distribution</p> Signup and view all the answers

    At which stage of the cell cycle is the integrity of DNA assessed?

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

    What happens when there is too much human growth hormone?

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

    What is the cause of crowding of cells inhibiting cell division?

    <p>Increased contact inhibition</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Browser