Multiple Choice
In prokaryotic cell architecture, what is the process of cell division in most prokaryotes called?
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1. Overview of Cell Biology
Prokaryotic Cell Architecture
Multiple Choice
Which set of features best describes the basic architecture of a typical prokaryotic cell?
A
DNA enclosed in a nucleus; cell wall made of cellulose; large central vacuole; 80S ribosomes
B
Membrane-bound nucleus; DNA packaged with histones into nucleosomes; chloroplasts present; 80S ribosomes
C
Membrane-bound nucleus containing linear chromosomes; extensive endomembrane system; has mitochondria and 80S ribosomes
D
No membrane-bound nucleus; DNA in a nucleoid region; lacks membrane-bound organelles; has 70S ribosomes; usually has a plasma membrane and a cell wall
Verified step by step guidance1
Step 1: Understand the defining characteristics of prokaryotic cells. Prokaryotes lack a membrane-bound nucleus, so their DNA is not enclosed within a nuclear membrane but is instead located in a nucleoid region.
Step 2: Recognize that prokaryotic cells do not have membrane-bound organelles such as mitochondria, chloroplasts, or an extensive endomembrane system, which are typical of eukaryotic cells.
Step 3: Identify the type of ribosomes present. Prokaryotic cells have 70S ribosomes, which are smaller than the 80S ribosomes found in eukaryotic cells.
Step 4: Note the presence of a plasma membrane and usually a cell wall. In prokaryotes, the cell wall is often made of peptidoglycan, not cellulose (which is found in plant cell walls).
Step 5: Compare the options given with these features to select the set that correctly describes prokaryotic cell architecture: no membrane-bound nucleus, DNA in nucleoid, absence of membrane-bound organelles, presence of 70S ribosomes, and usually a plasma membrane plus a cell wall.
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