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1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 39m
3. Energy & Cell Processes10h 8m
4. Tissues & Histology10h 3m
5. Integumentary System2h 28m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System3h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

3. Energy & Cell Processes

Cell Cycle Regulation

Anatomy & Physiology

3. Energy & Cell Processes

Cell Cycle Regulation

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Multiple Choice

Checkpoints within the cell cycle:

Are located within interphase and allow entry to G0.

Are located within G1, S and G2.

Are located within G1, M and G2.

Are located within G1, M, S and G2.

Are located within all the phases of the cell cycle.

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Verified step by step guidance

Understand the cell cycle phases: The cell cycle consists of interphase (G1, S, G2) and mitotic phase (M). Each phase has specific functions and checkpoints.

Identify the checkpoints: Checkpoints are control mechanisms that ensure the cell is ready to proceed to the next phase. They are crucial for maintaining the integrity of the cell's genetic material.

Locate the checkpoints: The main checkpoints are found in G1 (the restriction point), G2 (ensures all DNA is replicated and undamaged), and M (ensures chromosomes are properly aligned for division).

Consider the S phase: Although not traditionally listed as a checkpoint, the S phase is critical for DNA synthesis and has internal checks to ensure replication accuracy.

Conclude the correct answer: Based on the understanding of the cell cycle and checkpoints, the correct answer is that checkpoints are located within G1, M, S, and G2 phases.