Choose the correct answer from the alternatives given :
Histone proteins are

Basic, negatively charged

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Basic, positively charged

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Acidic, positively charged

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Acidic, negatively charged.

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Solution

The correct option is B Basic, positively charged
In eukaryotes, DNA organisation is complex. There-is a set of positively charged, basic proteins called histones. Histones are rich in the basic amino acid residues Iysine and arginine. There are five types of histone proteins - H1, H2A, H2B, H3 and H4. Four of them (H2A, H2B, H3 and H4) produce histone octamer called nu body or core of nucleosome.. The negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome. DNA connecting two adjacent nucleosomes is called linker DNA which bears H1 histone proteins.
So, the correct answer is 'Basic, positively charged'.

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Similar questions

Regarding assertion and reason, select the right option.

Assertion [A]: Charge of DNA molecule is negative.
Reason [R]: Histone proteins associated with DNA are positively charged.

As DNA is negatively charged (or acidic) and histone are positively charged in their side chain(or basic).. Can we assume that nucleosome as a whole will be neutral neither acidic nor basic

Q. Pick the incorrect statements among the following:
(i) A typical nucleosome contains 400 bp of DNA.
(ii) The positively charged DNA is wrapped around the negatively charged histone octamer to form a structure called nucleosome.
(iii) Histones are rich in the basic amino acid residues like asparagine and valine.
(iv) The packing of chromatin at higher level requires an additional set of proteins that collectively are referred to as non-histone chromosomal proteins.

Q. Identify the correct statements from the following.
1. In bacteria, negatively charged DNA is held by positively charged proteins in the nucleoid region.
2. Bacterial DNA is present in the nucleus.
3. The DNA of bacteria is associated with histones.
4. Bacteria have smaller, circular DNA molecules called plasmids.

Q. Choose the correct answer from the alternatives given :
The net electric charge on DNA and histones is

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Choose the correct answer from the alternatives given :Histone proteins are

Choose the correct answer from the alternatives given :
Histone proteins are