The Cell Cycle and its Phases Quiz

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

<p>To evaluate the cell's replicative potential before deciding to either enter the S phase and the next round of cell division or retire and leave the cell cycle</p> Signup and view all the answers

<p>Generation of aneuploid cells</p> Signup and view all the answers

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

<p>Mitotic catastrophe</p> Signup and view all the answers

<p>Generation of aneuploid cells</p> Signup and view all the answers

<p>~1 hour excluding karyokinesis and cytokinesis</p> Signup and view all the answers

<p>G1 phase = Characterized by continuous growth of the cell and synthesis of RNA and proteins S phase = Involves DNA synthesis and replication G2 phase = Preparation for mitosis and growth M (mitosis) phase = Includes division of the nucleus and the cell</p> Signup and view all the answers

<p>Mitotic catastrophe = Defined as the failure to arrest the cell cycle before or at mitosis, resulting in abnormal chromosome separation Restriction checkpoint = The most important checkpoint in the cell cycle where the cell self-evaluates its own replicative potential G1 phase = Phase characterized by cells preparing for DNA synthesis and cell division Aneuploid cells = Cells containing abnormal chromosome numbers</p> Signup and view all the answers

<p>Malfunction at any of the cell cycle checkpoints = Consequence may lead to mitotic catastrophe and generation of aneuploid cells Mitotic catastrophe = One of the mechanisms contributing to oncogenesis (tumor cell development) Failure to execute the apoptotic cycle = Likely division of cells asymmetrically in the next round of cell division Normal activation of apoptotic cycle = Results in death of cells with malfunctioning checkpoints</p> Signup and view all the answers

<p>G1 phase = Longest and most variable phase of the cell cycle, involving nutrient gathering and synthesis of RNA and proteins S phase = Period of DNA synthesis, resulting in the doubling of the cell's DNA and formation of new chromatids G2 phase = Phase involving cell growth and reorganization of cytoplasmic organelles before entering the mitotic cycle M phase = Phase characterized by cell preparation for cell division</p> Signup and view all the answers

<p>Initiation of DNA synthesis = S phase Synthesis of RNA and proteins necessary for DNA synthesis = G1 phase Examination of replicated DNA in preparation for cell division = G2 phase Mitosis = M phase</p> Signup and view all the answers

<p>Involves continuous growth of the cell = G1 phase Doubling of the DNA and formation of new chromatids = S phase Cell growth and reorganization of cytoplasmic organelles before entering the mitotic cycle = G2 phase Characterized by cell preparation for cell division = M phase</p> Signup and view all the answers

<p>About 7.5 to 10 hours = S phase Longest and most variable phase of the cell cycle = G1 phase Duration before entering the mitotic cycle = G2 phase Variable duration, typically about 24 hours in rapidly renewing human cells = Full cell cycle</p> Signup and view all the answers