Question

What is the nucleoid in prokaryotic cells?

Options

• A linear chromosome found in all prokaryotic cells

• The histone protein complex in prokaryotes

• The region where DNA is organised and associated with proteins in the absence of a true nucleus

• A membrane-bound organelle containing DNA

Answer 1

The nucleoid is the irregularly shaped region in prokaryotic cells (such as E. coli) where the genetic material is confined and organised, despite the absence of a true membrane-bound nucleus. It contains circular, negatively charged DNA that is compacted with the help of proteins like HU proteins and DNA gyrase.