Q.

Given below are two statements.
Statement I : In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid.
Statement II : In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome.
In the light of the above statements, choose the correct answer from the options given below.

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a

Statement I is incorrect but statement II is true.

b

Both statement I and statement II are false.

c

 Both statement I and statement II are true.

d

Statement I is correct but statement II is false.

answer is A.

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Detailed Solution

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(1) Statement I is incorrect but statement II is true.

Statement I is false. In prokaryotes, the negatively charged DNA is held with some positively charged proteins in a region called nucleoid.

Statement II is true. In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome. Histone proteins are of five types ( H2A,H2B, H3,H4 and H1), out of which four types of histone proteins forms octamer and H1 will be present outside the octamer .

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