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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

4. DNA, Chromosomes, and Genomes

Packaging of DNA

Cell Biology

4. DNA, Chromosomes, and Genomes

Packaging of DNA

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Multiple Choice

How many histone proteins are found within the nucleosome core?

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Verified step by step guidance

Understand the structure of a nucleosome: A nucleosome is the fundamental unit of chromatin, consisting of DNA wrapped around histone proteins.

Identify the types of histone proteins: The nucleosome core is composed of histone proteins H2A, H2B, H3, and H4.

Determine the number of each histone type in the nucleosome core: Each nucleosome core contains two copies of each histone type (H2A, H2B, H3, and H4).

Calculate the total number of histone proteins: Since there are two copies of each of the four histone types, multiply 4 (types) by 2 (copies) to find the total number of histone proteins.

Conclude the calculation: The total number of histone proteins in the nucleosome core is 8.