Question

The genetic material of a prokaryotic cell is present in:

• A. Nucleus
• B. Nucleolus
• C. Nucleoid
• D. Nucleosome

Hint:

Prokaryotes = No true membrane-bound nucleus; genomic D sits directly in the cytoplasm within the nucleoid.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
The question asks for the cellular region where genomic D is localized within a prokaryotic cell (such as bacteria and archaea).

Step 2: Key Formula or Approach:
Prokaryotes lack interl membrane-bound organelles, including a true membrane-bound nucleus. Their genetic material resides within an irregularly shaped cytoplasmic region known as the nucleoid.

Step 3: Detailed Explation:

• Characteristics of the Nucleoid: The nucleoid is an defined, non-membrane-bound cytoplasmic region that houses the circular double-stranded genomic D of prokaryotes.

• Prokaryotic D Organization: Bacterial D is localized in the nucleoid via supercoiling and interactions with nucleoid-associated proteins (Ps), such as HU and H-NS proteins.

• Alysis of Other Structures:

• Nucleus: A double-membrane bounded organelle encapsulating genetic material present exclusively in eukaryotic cells.

• Nucleolus: A dense region inside the eukaryotic nucleus responsible for ribosome biogenesis.

• Nucleosome: The fundamental structural unit of eukaryotic chromatin, consisting of D wrapped around an octamer of histone proteins.

Step 4: Fil Answer:
In prokaryotic cells, the genetic material is located in the nucleoid region.