Sometimes prokaryotic cells are surrounded by a gelatinous, sticky substance. What is this structure called?   A. glycocalyx B. slime C. cell wall D. filament

The image in A is Gram positive and that in B is Gram negative   A                                                                                                                                                                                         B  

Which of the following statements about endospores is TRUE? A. Endospores are formed as a way for prokaryotic cells to reproduce. B. Endospores can be easily destroyed with household bleach. C. Endospores form in response to harsh  environmental conditions. D. Endospores do not survive in the environment for more than a few days.

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.

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

How do disease-causing prions produce more disease-causing prions? A. They undergo DNA replication and division. B. They change the shape of cellular PrP. C. They introduce mutations in cellular PrP genes. D. They undergo transduction

________________ introduced  cleanliness and antiseptic techniques into nursing practice.

What is the difference between spores and endospores? A. Endospores are formed inside the nucleus; spores are formed in the cytoplasm. B. Endospores are formed by eukaryotes; spores are formed by prokaryotes. C .Spores are reproductive structures; endospores are stable resting structures. D. There is no difference between spores and endospores.

Bacterial cells that are in chains are described as ___________________