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 Heart2h 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 DNA Replication

Anatomy & Physiology

3. Energy & Cell Processes

Introduction to DNA Replication

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Multiple Choice

At each end of a DNA replication bubble is __________.

an origin of replication

a gene

a telomere

a ribosome

a replication fork

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Verified step by step guidance

Understand the structure of a DNA replication bubble: During DNA replication, the DNA double helix unwinds and forms a replication bubble. This bubble is where the replication process actively occurs.

Identify the components of the replication bubble: The replication bubble consists of two replication forks, one at each end, where the DNA strands are being unwound and replicated.

Clarify the role of the replication fork: A replication fork is the area where the DNA double helix is separated into two single strands, allowing the replication machinery to synthesize new complementary strands.

Differentiate between the options given: An origin of replication is the specific sequence where replication begins, but it is not located at the ends of the replication bubble. A gene is a segment of DNA that codes for a protein, not directly involved in the replication fork. A telomere is a repetitive DNA sequence at the end of a chromosome, not related to the replication fork. A ribosome is involved in protein synthesis, not DNA replication.

Conclude with the correct identification: At each end of a DNA replication bubble is a replication fork, where the DNA strands are actively being separated and replicated.