Table of contents

1. Overview of Cell Biology2h 49m
2. Chemical Components of Cells1h 14m
3. Energy1h 33m
4. DNA, Chromosomes, and Genomes2h 31m
5. DNA to RNA to Protein2h 31m
6. Proteins1h 36m
7. Gene Expression1h 42m
8. Membrane Structure1h 4m
- The Lipid Bilayer
  38m
- Membrane Proteins
  25m
9. Transport Across Membranes1h 52m
10. Anerobic Respiration1h 5m
11. Aerobic Respiration1h 11m
12. Photosynthesis52m
13. Intracellular Protein Transport2h 18m
14. Cell Signaling1h 28m
15. Cytoskeleton and Cell Movement1h 39m
16. Cell Division3h 5m
17. Meiosis and Sexual Reproduction50m
18. Cell Junctions and Tissues48m
19. Stem Cells13m
- Stem Cells
  13m
20. Cancer44m
21. The Immune System1h 6m
22. Techniques in Cell Biology1h 41m

16. Cell Division

Overview of the Cell Cycle

Cell Biology

16. Cell Division

Overview of the Cell Cycle

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Multiple Choice

Which phase of the cell cycle is characterized by DNA replication?

G2 phase

M phase

S phase

G1 phase

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Verified step by step guidance

Understand the cell cycle: The cell cycle consists of four main phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Each phase has a specific role in cell growth and division.

Focus on the S phase: The S phase, or Synthesis phase, is the part of the cell cycle where DNA replication occurs. During this phase, the cell duplicates its entire genome to ensure that each daughter cell receives an identical set of chromosomes.

Differentiate the phases: G1 phase is a period of cell growth and preparation for DNA replication. G2 phase is a period of further growth and preparation for mitosis. M phase is where mitosis and cytokinesis occur, leading to cell division.

Identify the correct phase: Since the question asks about the phase characterized by DNA replication, and DNA replication specifically occurs during the S phase, this is the correct answer.

Review the importance of DNA replication: DNA replication is crucial for maintaining genetic consistency across cell generations, ensuring that each daughter cell inherits an identical copy of the parent cell's DNA.