AP BIOLOGY

LABORATORY REVIEW

MOLECULAR BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Where can you find the DNA in a prokaryotic cell?
A
The nucleus
B
The cell envelope
C
The ribosomes
D
The cytoplasm
Explanation: 

Detailed explanation-1: -Prokaryotic cells, such as bacteria, have a free-floating chromosome that is usually circular and is not enclosed in a nuclear membrane . Instead, the DNA simply exists in a region of the cell called the nucleoid.

Detailed explanation-2: -In a prokaryotic cell, the DNA is present in the small region of the cytoplasm known as the nucleoid. Additionally, mitochondria and plastid also contain their own DNA. In a prokaryotic cell, it can also be found as a plasmid.

Detailed explanation-3: -All of the genetic information in a cell was initially thought to be confined to the DNA in the chromosomes of the cell nucleus. It is now known that small circular chromosomes, called extranuclear, or cytoplasmic, DNA, are located in two types of organelles found in the cytoplasm of the cell.

Detailed explanation-4: -Cytoplasm of prokaryotic cells Located within the cytoplasm of a prokaryotic cell is a single loop of DNA known as a nucleoid. The nucleoid is not membrane bound and suspends freely within the cytosol. Accompanying the nucleoid material of the prokaryotic cell is a small ring of extrachromosomal DNA known as plasmid.

Detailed explanation-5: -DNA in eukaryotic cells is found inside the nucleus, while DNA in prokaryotic cells is located in the cytoplasm. Eukaryotic cells are generally larger and more complex than prokaryotic cells. Eukaryotic organisms include animals, plants, fungi, and paramecia. Prokaryotic organisms include bacteria and archaea.

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