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Molecular Basis of Inheritance
The Structure of DNA and Packaging of DNA Helix
1 question from 1 paper, each with its answer.
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- of Molecular Basis of Inheritance
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Concepts tested
- nucleoid and nucleosome
All Questions
2023 1 question
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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:
DNA is negatively charged and is held by positively charged proteins, so Statement I is incorrect.
In prokaryotes, such as E. coli, though they do not have a defined nucleus, the DNA is not scattered throughout the cell. DNA (being negatively charged) is held with some proteins (that have positive charges) in a region termed as 'nucleoid'. The DNA in nucleoid is organised in large loops held by proteins.
