Scelta multipla
Which type of cell is considered the oldest in evolutionary history?
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26. Prokaryotes
Introduction to Prokaryotes
Scelta multipla
In bacteria, DNA will be found in _______________.
A
A membrane-enclosed nucleus.
B
Mitochondria.
C
The nucleoid.
D
Ribosomes.
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Understand that bacteria are prokaryotic organisms, which means they do not have membrane-bound organelles.
Recognize that in prokaryotes, DNA is not enclosed within a membrane-bound nucleus as it is in eukaryotes.
Learn that the region where DNA is located in bacteria is called the nucleoid, which is an irregularly-shaped area within the cell.
Note that the nucleoid contains the bacterial chromosome, which is typically a single, circular DNA molecule.
Remember that other structures like mitochondria and ribosomes are not involved in housing bacterial DNA; mitochondria are absent in bacteria, and ribosomes are involved in protein synthesis.
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