Multiple Choice
In the context of prokaryotic cell architecture, organisms in which kingdom characteristically have peptidoglycan in their cell wall?
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1. Overview of Cell Biology
Prokaryotic Cell Architecture
Multiple Choice
In prokaryotic cell architecture, what is the primary function of a plasmid?
A
It contains the rRNA genes and is the location where ribosomal subunits are assembled.
B
It carries extra-chromosomal genes that can provide advantageous traits such as antibiotic resistance and can replicate independently of the bacterial chromosome.
C
It is the main site of ATP production through oxidative phosphorylation in the cytoplasm.
D
It forms the rigid structural layer that protects the cell and prevents osmotic lysis.
Verified step by step guidance1
Step 1: Understand what a plasmid is in the context of prokaryotic cells. A plasmid is a small, circular DNA molecule that exists independently of the bacterial chromosome.
Step 2: Recognize that plasmids carry extra-chromosomal genes, which means they are not part of the main bacterial chromosome but can replicate on their own.
Step 3: Identify the types of genes plasmids often carry, such as those providing advantageous traits like antibiotic resistance, which can help bacteria survive in challenging environments.
Step 4: Differentiate plasmids from other cellular components by their function: unlike ribosomal RNA genes, ATP production sites, or structural layers, plasmids primarily serve as carriers of additional genetic information.
Step 5: Conclude that the primary function of a plasmid is to carry extra-chromosomal genes that can provide beneficial traits and replicate independently, enhancing bacterial adaptability.
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