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Questions and Answers
Which of the following features distinguishes prokaryotic cells from eukaryotic cells?
What is the typical size range for eukaryotic cells?
Which cell structure is present in all eukaryotic cells but absent in prokaryotic cells?
How are ribosomes in prokaryotic cells different from those in eukaryotic cells?
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Which type of cell division is characteristic of prokaryotic cells?
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Study Notes
Cell Type and Structure
- Prokaryotes are always unicellular, while eukaryotes can be either unicellular or multi-cellular.
- Prokaryotic cells are typically smaller, ranging from 0.2 µm to 2.0 µm in diameter, whereas eukaryotic cells are larger, ranging from 10 µm to 100 µm in diameter.
Cell Wall
- Prokaryotes usually have a cell wall, which is chemically complex in nature.
- Eukaryotes have a cell wall, but only in plant cells.
Nucleus
- Prokaryotes lack a nucleus, instead having a nucleoid region in the cell.
- Eukaryotes have a present nucleus.
Ribosomes
- Both prokaryotes and eukaryotes have ribosomes, but they differ in size and shape.
- Prokaryotic ribosomes are smaller and spherical in shape, while eukaryotic ribosomes are larger and linear in shape.
DNA Arrangement
- Prokaryotes have circular DNA arrangement.
- Eukaryotes have linear DNA arrangement.
Mitochondria
- Prokaryotes lack mitochondria.
- (No mention of eukaryotes having mitochondria, but it is implied)
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Description
Explore the key differences between prokaryotic and eukaryotic cells, including cell size, cell wall composition, and more.
