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 primarily responsible for DNA replication?

G1 phase

G2 phase

S phase

M phase

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Verified step by step guidance

Understand the cell cycle: The cell cycle is divided into 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 DNA replication: DNA replication is the process by which a cell duplicates its DNA to ensure that each daughter cell receives an identical copy during cell division.

Identify the phase responsible for DNA replication: DNA replication occurs during the S phase (Synthesis phase) of the cell cycle. This is when the cell synthesizes a complete copy of its DNA.

Differentiate the phases: G1 phase is primarily for cell growth and preparation for DNA replication. G2 phase is for preparation for mitosis, including protein synthesis and organelle duplication. M phase is for mitosis, where the cell divides into two daughter cells.

Conclude: The S phase is the correct answer because it is the phase dedicated to DNA replication, ensuring the genetic material is accurately copied before cell division.