Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
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 System2h 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

What is checked during the G1 checkpoint of the cell cycle?

Chromosome alignment

Spindle fiber attachment

DNA damage and cell size

DNA replication completion

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Verified step by step guidance

Understand the context of the cell cycle: The cell cycle is a series of phases that a cell goes through to divide and produce new cells. It includes the G1, S, G2, and M phases.

Identify the role of the G1 checkpoint: The G1 checkpoint is a critical control point where the cell assesses whether it is ready to proceed with DNA synthesis in the S phase.

Determine what is checked at the G1 checkpoint: At this checkpoint, the cell checks for DNA damage and ensures that the cell has reached an adequate size to support division.

Differentiate from other checkpoints: Unlike the G2 checkpoint, which checks for DNA replication completion, or the M checkpoint, which checks for chromosome alignment and spindle fiber attachment, the G1 checkpoint focuses on DNA integrity and cell size.

Conclude the importance of the G1 checkpoint: This checkpoint helps prevent the division of cells with damaged DNA or insufficient size, thereby maintaining genomic stability and proper cell function.