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

During which three phases of the cell cycle are individual chromosomes no longer visible under a light microscope?

Telophase, Cytokinesis, and G0 phase

G1, S, and G2 phases

S, M, and G0 phases

Prophase, Metaphase, and Anaphase

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Verified step by step guidance

Understand that chromosomes are visible under a light microscope when they are condensed. Chromosome condensation occurs during mitosis (M phase), specifically starting in prophase and remaining visible through metaphase, anaphase, and telophase.

Recall that during interphase (G1, S, and G2 phases), chromosomes are not condensed. Instead, they exist as chromatin, a less compact form of DNA, which is not visible under a light microscope.

Eliminate options that include phases where chromosomes are condensed and visible, such as prophase, metaphase, and anaphase, as these are part of mitosis.

Focus on the phases where chromosomes are not visible: G1 (cell growth), S (DNA synthesis), and G2 (preparation for mitosis). These phases are part of interphase, where chromatin is decondensed.

Conclude that the correct answer is G1, S, and G2 phases, as these are the phases during which individual chromosomes are no longer visible under a light microscope due to their decondensed state.