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 DNA Replication

Anatomy & Physiology

3. Energy & Cell Processes

Introduction to DNA Replication

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

What is the function of the enzyme topoisomerase in DNA replication?

Relieving strain in the DNA ahead of the replication fork caused by the untwisting of the double helix.

Elongating new DNA at a replication fork by adding nucleotides to the existing chain.

Reattaching the hydrogen bonds between the base pairs in the double helix.

Building RNA primers using the parental DNA strand as a template.

Previous problemNext problem

Verified step by step guidance

Understand the context of DNA replication: DNA replication is the process by which a cell duplicates its DNA, ensuring that each new cell receives a complete set of genetic instructions.

Identify the role of topoisomerase: Topoisomerase is an enzyme that helps manage the topology of DNA during replication. It alleviates the tension and strain caused by the unwinding of the DNA double helix.

Recognize the problem caused by unwinding: As the DNA helix unwinds, it creates supercoiling and tension ahead of the replication fork, which can hinder the progress of replication.

Explain how topoisomerase functions: Topoisomerase works by cutting one or both strands of the DNA, allowing it to rotate and relieve the tension, and then rejoining the strands. This action prevents the DNA from becoming too tightly coiled.

Clarify the importance of topoisomerase: By relieving the strain ahead of the replication fork, topoisomerase ensures smooth progression of the replication machinery, facilitating the accurate and efficient duplication of DNA.