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:
Answer: (D) Statement I is incorrect but Statement II is true.. Answer: (D) Statement I is incorrect but Statement II is true.
- A.Both Statements I and Statement II are true.
- B.Both statements 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.✓
Correct Answer
(D) Statement I is incorrect but Statement II is true.
Solution & Explanation
Answer: (D) Statement I is incorrect but Statement II is true. Solution: In prokaryotes the genetic material (DNA) is naked and not enveloped by a nuclear membrane; DNA is negatively charged (not positively charged), so Statement I is incorrect. In eukaryotes the negatively charged DNA is wrapped around the positively charged histone octamer to form the nucleosome, so Statement II is true. Hence Statement I is incorrect but Statement II is true. NCERT Reference: Ch 8, p.90, lines 6–9: "There is no well-defined nucleus. The genetic material is basically naked, not enveloped by a nuclear membrane. In addition to the genomic DNA (the single chromosome/circular DNA)"