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

1. Overview of Cell Biology

Model Organisms

Cell Biology

1. Overview of Cell Biology

Model Organisms

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Multiple Choice

Which of the following organisms would be the most difficult to use when performing a genetic screen?

Yeast

E. coli

Zebrafish

Mice

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Verified step by step guidance

Understand what a genetic screen is: A genetic screen is a technique used to identify and select individuals who possess a phenotype of interest in a mutagenized population.

Consider the reproductive cycle and generation time: Organisms with shorter generation times and larger numbers of offspring are generally more suitable for genetic screens because they allow for quicker and more extensive analysis.

Evaluate the complexity of the organism's genome: Simpler organisms with smaller genomes are easier to manipulate genetically, making them more suitable for genetic screens.

Assess the ethical and logistical considerations: Larger and more complex organisms, such as mice, often have more ethical and logistical challenges associated with their use in genetic screens.

Compare the organisms: Yeast and E. coli are single-celled organisms with short generation times and simple genomes, making them ideal for genetic screens. Zebrafish, while more complex, still have relatively short generation times and are used in genetic studies. Mice, however, have longer generation times, more complex care requirements, and ethical considerations, making them the most difficult to use for genetic screens.