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

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Multiple Choice

Why is mitosis necessary in multicellular organisms?

To reduce the chromosome number by half for sexual reproduction

To generate genetic diversity through recombination

To produce identical daughter cells for growth and tissue repair

To synthesize ATP for cellular energy

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Verified step by step guidance

Understand the purpose of mitosis: Mitosis is a process of cell division that results in two genetically identical daughter cells from a single parent cell. This is crucial for growth, tissue repair, and maintaining genetic consistency in multicellular organisms.

Eliminate incorrect options: The first option, 'To reduce the chromosome number by half for sexual reproduction,' refers to meiosis, not mitosis. Meiosis is the process that produces gametes (sperm and egg cells) with half the chromosome number.

Analyze the second option: 'To generate genetic diversity through recombination' is also incorrect because recombination occurs during meiosis, not mitosis. Mitosis produces identical cells without introducing genetic diversity.

Evaluate the correct answer: The third option, 'To produce identical daughter cells for growth and tissue repair,' is correct because mitosis ensures that new cells have the same genetic material as the parent cell, which is essential for maintaining the organism's structure and function.

Review the last option: 'To synthesize ATP for cellular energy' is unrelated to mitosis. ATP synthesis occurs in cellular respiration, primarily in the mitochondria, and is not a function of mitosis.