Table of contents

1. Overview of Cell Biology2h 49m
2. Chemical Components of Cells1h 14m
3. Energy1h 33m
4. DNA, Chromosomes, and Genomes2h 31m
5. DNA to RNA to Protein2h 31m
6. Proteins1h 36m
7. Gene Expression1h 42m
8. Membrane Structure1h 4m
- The Lipid Bilayer
  38m
- Membrane Proteins
  25m
9. Transport Across Membranes1h 52m
10. Anerobic Respiration1h 5m
11. Aerobic Respiration1h 11m
12. Photosynthesis52m
13. Intracellular Protein Transport2h 18m
14. Cell Signaling1h 28m
15. Cytoskeleton and Cell Movement1h 39m
16. Cell Division3h 5m
17. Meiosis and Sexual Reproduction50m
18. Cell Junctions and Tissues48m
19. Stem Cells13m
- Stem Cells
  13m
20. Cancer44m
21. The Immune System1h 6m
22. Techniques in Cell Biology1h 41m

16. Cell Division

Control of the Cell Cycle

Cell Biology

16. Cell Division

Control of the Cell Cycle

Previous problemNext problem

Struggling with Cell Biology?

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

Multiple Choice

Which of the following acts as a control of cell division?

Ribosomes

Lysosomes

Mitochondria

Cyclin-dependent kinases (Cdks)

Previous problemNext problem

Verified step by step guidance

Understand the context of the question: The problem is asking about the control of cell division, which is a key process in cell biology. The options provided (Ribosomes, Lysosomes, Mitochondria) are organelles, but the correct answer is a protein complex, Cyclin-dependent kinases (Cdks).

Recall the role of Cyclin-dependent kinases (Cdks): Cdks are enzymes that regulate the cell cycle by phosphorylating specific target proteins. They are activated by binding to cyclins, which are regulatory proteins whose levels fluctuate during the cell cycle.

Differentiate between the options: Ribosomes are involved in protein synthesis, Lysosomes are responsible for breaking down cellular waste, and Mitochondria are the powerhouse of the cell, generating ATP. None of these organelles directly control cell division.

Explain how Cdks control cell division: Cdks ensure that the cell progresses through the different phases of the cell cycle (G1, S, G2, and M phases) in a controlled manner. For example, the G1/S checkpoint is regulated by specific cyclin-Cdk complexes to ensure DNA is undamaged before replication.

Summarize the importance of Cdks: Cyclin-dependent kinases are essential for maintaining the proper timing and order of cell cycle events, preventing uncontrolled cell division, which could lead to conditions like cancer.