Cell Cycle and Cell Division

Topics in this chapter

• Cell Cycle Phases and DNA Replication
• Cell Cycle Regulation and Checkpoints
• Mitosis and Chromosome Segregation
• Cytokinesis in Plant and Animal Cells
• Meiosis Stages and Chromosome Behavior
• Prophase I Synapsis and Recombination

Cheat sheet

Practice questions

1. Question 1Q-055931

   During which phase of the cell cycle does DNA replication take place in eukaryotes?

   1. A.G1 phase
   2. B.S phase
   3. C.G2 phase
   4. D.M phase
   See the answer and solution
2. Question 2Q-02D2A0

   Identify the correct sequence of substages in Prophase I of meiosis.

   1. A.Leptotene -> Pachytene -> Zygotene -> Diplotene -> Diakinesis
   2. B.Leptotene -> Zygotene -> Pachytene -> Diakinesis -> Diplotene
   3. C.Leptotene -> Zygotene -> Pachytene -> Diplotene -> Diakinesis
   4. D.Zygotene -> Leptotene -> Pachytene -> Diplotene -> Diakinesis
   See the answer and solution
3. Question 3Q-61FFF2

   At which stage of mitosis are chromosomes morphologically most distinct and best counted?

   1. A.Prophase
   2. B.Metaphase
   3. C.Anaphase
   4. D.Telophase
   See the answer and solution
4. Question 4Q-811C49

   The enzyme recombinase is active during which specific stage of meiosis?

   1. A.Zygotene
   2. B.Pachytene
   3. C.Diplotene
   4. D.Diakinesis
   See the answer and solution
5. Question 5Q-357D8B

   Cells that do not divide further and exit the G1 phase to enter an inactive stage are said to be in:

   1. A.S phase
   2. B.G2 phase
   3. C.Quiescent stage (G0)
   4. D.M phase
   See the answer and solution