15 Questions
What is the most outstanding feature of a eukaryotic cell?
Presence of a true nucleus surrounded by a membrane
Which microscope revealed striking differences between bacteria and cells of other organisms in the 1950s?
Transmission electron microscope
What is the structure known as in prokaryotic cells, which is equivalent to the true nucleus in eukaryotic cells?
Nucleoid
What is the function of the nucleoid in prokaryotic cells?
Storage of genetic material
Based on staining results, what aspect of prokaryotic cells is characterized in terms of cell wall chemistry?
Surface appendages
What is the most significant difference between eukaryotic and prokaryotic cells?
Presence of a true nucleus
What is the molecular weight of the circular DNA molecule found in bacterial cells?
3 X 10^9 Dalton
What is the typical length of bacterial cells?
1 - 2 µm
Which type of bacteria has a characteristic spiral shape?
Spirillum
What is the purpose of the glycocalyx layer in bacterial cells?
To allow the cell to attach
Which arrangement is characteristic of bacilli division?
Streptobacillus: A chain of bacilli
What structure allows bacterial cells to prevent phagocytosis?
Capsules
What is the typical size range of Mycoplasmas, a group of atypical pneumonia-causing bacteria?
0.1 - 0.2 µm in diameter
Which staining method can be used to visualize the nucleoid of bacterial cells?
Feulgen staining
What is the shape of bacteria known as cocci?
"Spherical or oval"
Explore the history, classification, and structural differences between prokaryotes and eukaryotes in microbiology with this quiz. Learn about the pioneers of microbiology and the scope of microorganisms.
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