5 Questions
What is the primary difference between prokaryotic and eukaryotic cells regarding the nucleus?
Prokaryotic cells have a nucleoid region instead of a nucleus
Which of the following cell components is present in eukaryotic cells but absent in prokaryotic cells?
Mitochondria
What type of cell division occurs in prokaryotic cells?
Binary fission
How is the DNA arranged in prokaryotic cells?
In circular chromosomes in the nucleoid region
Which of the following is a characteristic of eukaryotic cells but not prokaryotic cells?
Larger and linear-shaped ribosomes
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)
Compare and contrast the characteristics of prokaryotic and eukaryotic cells, including cell size, cell wall, and type of cell. Learn about the differences between these two types of cells.
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