Chemistry NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 10 PCB Single Correct MCQ
Published on: August 13, 2026

In E. coli and other prokaryotes, how is the DNA within the nucleoid region organised?

A
Negatively charged DNA coiled around histone proteins
B
Densely packed chromatin associated with nonhistone chromosomal (NHC) proteins
C
Large loops of DNA held together by proteins
D
As several repeating nucleosome units

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The correct answer is:
C

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 pr ọ teins.

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