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

Previous problemNext problem

Problem 19a

Textbook Question

Mark the following statements about the cell cycle as true or false. If a statement is false, correct it to make a true statement.
During the S phase of the cell cycle, the cell stalls until conditions for division are more favorable

Verified step by step guidance

Understand the cell cycle phases: The cell cycle consists of interphase (G1, S, and G2 phases) and the mitotic phase (M phase). The S phase is specifically responsible for DNA replication, not stalling for favorable conditions.

Analyze the statement: The statement claims that during the S phase, the cell stalls until conditions for division are more favorable. This is incorrect because the S phase is dedicated to DNA synthesis and replication, not stalling.

Correct the false statement: The corrected statement should be: 'During the S phase of the cell cycle, the cell replicates its DNA in preparation for cell division.'

Review the purpose of stalling in the cell cycle: Stalling typically occurs at checkpoints, such as the G1 checkpoint or G2 checkpoint, where the cell ensures conditions are favorable for division and checks for DNA damage.

Conclude the correction: The S phase is an active phase of DNA replication, and stalling for favorable conditions does not occur during this phase. Ensure understanding of the distinction between checkpoints and specific phases of the cell cycle.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above

Play a video:

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Cell Cycle Stages

The cell cycle consists of several stages, including G1, S, G2, and M phases. Each phase has specific functions, with the S phase being crucial for DNA replication. Understanding these stages helps clarify the processes that prepare a cell for division.

S Phase Function

The S phase, or synthesis phase, is when a cell replicates its DNA, ensuring that each daughter cell receives an identical set of chromosomes. This phase is characterized by active DNA synthesis, not stalling, which is a common misconception.

Cell Cycle Regulation

The cell cycle is tightly regulated by various checkpoints and proteins that ensure conditions are suitable for progression. If conditions are unfavorable, the cell may enter a resting state (G0) rather than stalling in the S phase, highlighting the importance of regulation in cell division.