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 G2 checkpoint in the cell cycle?

To verify that the cell has sufficient nutrients and energy to proceed with division.

To check that the spindle fibers are properly attached to the chromosomes.

To confirm that the cell has reached an adequate size for division.

To ensure that DNA has been accurately replicated and is undamaged before mitosis.

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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 phase, S phase, G2 phase, and M phase (mitosis).

Identify the role of checkpoints: Checkpoints are control mechanisms in the cell cycle that ensure each phase is completed accurately before moving on to the next phase. They help prevent errors such as DNA damage or incomplete replication.

Focus on the G2 checkpoint: The G2 checkpoint occurs after DNA replication in the S phase and before mitosis. Its primary role is to ensure that all DNA has been accurately replicated and is undamaged.

Consider the options provided: The G2 checkpoint is specifically responsible for verifying the integrity of the DNA before the cell enters mitosis. This involves checking for any DNA damage and ensuring that replication is complete.

Conclude with the correct function: The primary function of the G2 checkpoint is to ensure that DNA has been accurately replicated and is undamaged before the cell proceeds to mitosis, thereby maintaining genomic stability.