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Histone Protein

How is the DN...

Question

How is the DNA molecule negatively charged??

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Solution

DNA molecule is negatively charged because of negative phosphate ions which constitute the nucleotides that make its backbone.

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DNA molecule is negatively charged because of:

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.

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. Select the correct statements.
A) H1 histone molecules lie inside the core of the molecule and seals the two turns of DNA.
B) The acrocentric chromosome has two long arms.
C) The association between negatively charged DNA and positively charged histones allows for meaningful DNA packaging inside the nucleus.
D) A few chromosomes have non-staining secondary constrictions at a constant location which gives the appearance of a small fragment called the satellite.

Q. DNA segment in a neutral pH solution are negatively charged, there are two excess electrons per base pair if a 0.1 micron DNA fragment has a charge of

- 9.1 \times 10^{- 17} C

, how many basepairs are there along this fragment?

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