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Nu-body has two copies of each...

Nu-body has two copies of each

A

H_2,A & H_2,B

B

H_1 & H_2

C

H_3 & H_4

D

All except (2)

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Question**: The question states that "nobody has two copies of each H2A, H2B, H1, H2, H3, H4 and all except two." We need to identify what "nobody" refers to in this context. 2. **Identifying "Nobody"**: The term "nobody" refers to the core part of the nucleosome, which is composed of histone proteins. 3. **Histone Proteins in Nucleosome**: The nucleosome is made up of a core of histone proteins. The specific histones involved are: - 2 copies of H2A - 2 copies of H2B - 2 copies of H3 - 2 copies of H4 4. **Histone Octamer**: Since there are 8 histone proteins in total (2 of each type), this structure is referred to as a histone octamer. 5. **Exclusion of H1**: The question mentions "all except two," which indicates that H1 is not included in the histone octamer. H1 is a linker histone and does not form part of the core nucleosome structure. 6. **Evaluating the Options**: - H2A and H2B: Correct, as both are part of the histone octamer. - H1 and H2: Incorrect, because H1 is not part of the octamer. - H3 and H4: Correct, as both are also part of the histone octamer. 7. **Conclusion**: The only incorrect option is the one that includes H1. Therefore, the answer to the question is that all options except the one including H1 are correct. ### Final Answer: All options except the one that includes H1 are correct. ---
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