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Home Q & A Board Biology-Related Homework Help Cell Biology
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chang190 chang190
wrote...
13 years ago
Histones interact with DNA in order to:?
1. counteract the positively charged phosphates in the DNA backbone and allow it to coil more tightly.
2. protect bacterial chromosomes from chemical mutagens.
3. regulate expression of the DNA by making it either accessible or compacted.
4. manage supercoiling by breaking and rejoining DNA molecules.
5.coat the DNA to protect it from nucleases in the cell.


Only one of the following is true!
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wrote...
#1
Educator
13 years ago
1. counteract the positively charged phosphates in the DNA backbone and allow it to coil more tightly.
2. protect bacterial chromosomes from chemical mutagens.
3. regulate expression of the DNA by making it either accessible or compacted.
4. manage supercoiling by breaking and rejoining DNA molecules.
5.coat the DNA to protect it from nucleases in the cell.

You see 1 would be correct but phosphate is negatively charged - not positively charged.

The only other option is 3. I'm going with 3.
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