Microbiology 1. What distinguishes bacterial ribosomes from eukaryotic ribosomes? Describe the steps involved in the formation and germination of endospores.
Added by Toni E.
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- Eukaryotic ribosomes are larger, 80S, composed of a 60S large subunit and a 40S small subunit. - The differences in ribosomal RNA (rRNA) and protein content between bacterial and eukaryotic ribosomes allow selective targeting by antibiotics. - Bacterial Show more…
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4. Explain the survival significance of endospores. What is chemically and physically unique about these structures which contribute to their survivability? 5. How would one determine if there are endospores present in a specimen? What are the two major genera that produce endospores? 6. What kinds of cytoplasmic inclusions can a bacterium have—for what purpose? 7. Describe different ways by which eukaryotic cells move (e.g. cilia, flagella, etc.) 8. Describe plasmids and nucleoid.
Adi S.
7. What is the shape of this organism? 8. What is the shape of the spore? ** 9. What is the location of the spore within the mother cell? ** 10. Name a genus of bacteria that forms endospores. ** Make sure to use the terms presented in recitation 11. In which culture, a 24-hour old culture or a 7-day old culture, would you observe endospores? Why? 12. Gram staining should be done using a 24-hour broth culture ONLY. Why? 13. If you did not heat fix before staining, what would happen when you did the staining procedure? 14. Why is the decolorizing step the most important step in a Gram stain? 15. List the steps in aseptic transfer of an organism from a broth culture to a microscope slide.
Sri K.
Chapter Concepts 1. The last universal common ancestor was a cell that gave rise to three types of cells: archaea & 2. Which scientist disproved spontaneous generation? 3. Identify the 5 different microbiologists and what each does. (example-environmental microbiologists- study effects of microbes on the Earth's diverse habitats) Chapter 3 Concepts 4. DNA is a double helix. 5. Describe what is meant by a bacteria being fastidious when growing on a plate. This is why we can have selective and differential media. 6. A capsule stain is best described as a stain, as it differentiates between whether a capsule is present. 7. Bacteria that require special growth factors and complex media are termed Chapter 5 Concepts 8. Describe the asexual reproduction of yeasts. 9. & have been traditionally combined into the Kingdom Protista. Chapter 6 Concepts 10. In persistent viral infections, chronic viruses have activation after a period of inactivation. 11. Describe why anti-viral drugs are often difficult to develop. Chapter 7 Concept 12. Describe why media plates are often kept in a fridge for storage. What affect does temperature have on growth? 13. Distinguish between the term, aerobe, obligate aerobe, facultative aerobe, microaerophile, and obligate anaerobe.
Dominador T.
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