NEET 2023, Biology Q62: Structure and Functions of Cell Organelles
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:
- A
Both Statement I and Statement II are true.
- B
Both Statement I and Statement II are false.
- C
Statement I is correct but Statement II is false.
- D
Statement I is incorrect but Statement II is true.
DNA itself is negatively charged (because of the phosphate backbone). In prokaryotes the negatively charged DNA is associated with positively charged proteins in the nucleoid — Statement I reverses the charges and is wrong. In eukaryotes the negatively charged DNA wraps around the positively charged histone octamer to form a nucleosome — Statement II is correct.
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