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Which of the following contribute to the successful application of Koch’s postulates? A. The development of the compound microscope. B. The theory of abiogenesis. C. The ability to record the appearance of bacteria photographically. D. The development of simple bacterial staining techniques. E. The development of techniques for sterile transfer of bacteria.

What does the science of Microbiology study? A. Bacteria B. All life forms C. Disease causing life forms D. Life forms or infectious agents too small to see with naked eyes

Bacterial cells use ________ to transfer DNA from one cell to another via conjugation.   A. fimbriae B. pili C. flagella D. cilia

Which of the following describes a difference between prokaryotes and archaea?   A. Prokaryotes have cell walls composed of peptidoglycan, whereas archaea do not. B. Archaea can live only in water, and prokaryotes can live anywhere. C. Prokaryotes lack nuclei, whereas archaea do not. D. Prokaryotes reproduce asexually, whereas archaea reproduce sexually.

Describe Koch’s  experiments and  enumerate his postulates .

Where can lipopolysaccharide be found?   A. in the flagella of bacterial cells B. in the peptidoglycan layer of Gram-positive bacterial cells C. in the outer membrane of Gram-positive bacterial cells D. in the outer membrane of Gram-negative bacterial cells

________ contain a nucleus composed of genetic material surrounded by a membrane.   A. Prokaryotes B. Prokaryotes and archaea C. Eukaryotes D. Eukaryotes and archaea

Lysozyme is an antibacterial enzyme in human tears that degrades peptidoglycan. Which type of organism would be MOST sensitive to lysozyme?   A. Archaeon  B. Alga C. Gram-negative bacterium D. Gram-positive bacterium

Which of the following are NOT eukaryotic microbes? A. Algae B. Archaea C. Water molds D. Protozoa

Cells use ________ to transfer DNA from one cell to another via conjugation. A. fimbriae B. Pili C. Celia D. Flagella