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

Introduction to the Cell Cycle

Anatomy & Physiology

3. Energy & Cell Processes

Introduction to the Cell Cycle

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Multiple Choice

How does a nucleus in the G2 phase differ from a nucleus in the G1 phase of the cell cycle?

The nucleus in G2 has the same amount of DNA as in G1.

The nucleus in G2 has no DNA, while G1 has a full set of DNA.

The nucleus in G2 has twice the amount of DNA compared to G1.

The nucleus in G2 has half the amount of DNA compared to G1.

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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). G1 is the first gap phase, S is the synthesis phase where DNA replication occurs, and G2 is the second gap phase.

Recognize the DNA content changes: During the G1 phase, the cell has a normal diploid amount of DNA. In the S phase, DNA replication occurs, doubling the DNA content.

Compare G1 and G2 phases: After the S phase, the cell enters the G2 phase with twice the amount of DNA compared to the G1 phase, as the DNA has been replicated.

Clarify the incorrect options: The nucleus in G2 does not have the same amount of DNA as in G1, nor does it have no DNA. It also does not have half the amount of DNA compared to G1.

Conclude with the correct understanding: The nucleus in the G2 phase has twice the amount of DNA compared to the G1 phase, due to the replication of DNA during the S phase.