Textbook Question
The following is a diagram of the general structure of the bacteriophage chromosome. Speculate on the mechanism by which it forms a closed ring upon infection of the host cell.
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7. DNA and Chromosome Structure
Bacterial and Viral Chromosome Structure
Multiple Choice
In prokaryotic cells, where is the cell’s DNA primarily stored?
A
In the nucleoid region of the cytoplasm (not enclosed by a membrane)
B
In the endoplasmic reticulum
C
Inside a membrane-bound nucleus
D
Within mitochondria
Verified step by step guidance1
Understand that prokaryotic cells differ from eukaryotic cells in their cellular organization, particularly in the presence or absence of membrane-bound organelles.
Recall that in eukaryotic cells, DNA is stored inside a membrane-bound nucleus, but prokaryotic cells lack a nucleus.
Identify that prokaryotic DNA is located in a specific region of the cytoplasm called the nucleoid, which is not enclosed by a membrane.
Recognize that the endoplasmic reticulum and mitochondria are membrane-bound organelles found in eukaryotic cells, not in prokaryotes.
Conclude that the cell’s DNA in prokaryotic cells is primarily stored in the nucleoid region of the cytoplasm, which is distinct from membrane-bound compartments.
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