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 the primary function of the G1 checkpoint in the cell cycle?

To check for proper chromosome alignment before mitosis

To initiate the separation of sister chromatids

To verify that DNA replication has been completed successfully

To ensure that the cell has adequate energy and resources for DNA replication

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Verified step by step guidance

Understand the cell cycle: The cell cycle consists of several phases, including G1, S, G2, and M. Each phase has specific functions and checkpoints to ensure proper cell division.

Identify the G1 phase: The G1 phase is the first gap phase after cell division, where the cell grows and prepares for DNA replication. It is crucial for determining whether the cell is ready to proceed to the S phase, where DNA replication occurs.

Explore the role of the G1 checkpoint: The G1 checkpoint is a control mechanism that ensures the cell is ready for DNA synthesis. It checks for adequate size, energy, and resources, as well as the absence of DNA damage.

Differentiate between checkpoints: The G1 checkpoint is distinct from other checkpoints, such as the G2 checkpoint, which verifies DNA replication completion, and the M checkpoint, which checks chromosome alignment before mitosis.

Conclude the primary function: The primary function of the G1 checkpoint is to ensure that the cell has adequate energy and resources for DNA replication, allowing the cell to proceed to the S phase safely.