Chapter 27 - Lecture Questions

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Lecture Questions Chapter 27 CODE: CCXL 1Q What two domains are prokaryotic? 1A Bacteria and Archaea 2Q What is the reason our Archaea can live in extreme environments? 2A Archaea has tetraethers which form a monolayer to withstand high temperatures 3Q List 4 molecular classification methods? 3A Amino acid sequences of key proteins, Nucleic acid hybridization, Gene and RNA sequencing, and Whole- genome sequencing 4Q In the gram staining technique, what is the result? And what is the reason for such results? 4A Gram positive bacteria will have a thicker peptidoglycan wall and stain purple, as for Gram negative bacteria has a thin peptidoglycan wall and doesn’t retain the purple colored dye which then retains a counterstain and looks pink. 5Q What is an endospore? 5A Develops a thick wall around its genome and some cytoplasm when exposed to environmental stress (especially heat) 6Q List 3 types of horizontal gene transfer, and briefly describe each? 6A Conjugation – cell to cell contact Transduction – by viruses Transformation – DNA from the environment 7Q When bacteria transfer plasmids what does it mean when bacterial cells are either F + or F - ? 7A The F + cells produce F pilus 8Q What causes antibiotic resistance? 8A R (resistant) plasmids encode antibiotic resistance genes through transposable elements 9Q List 3 beneficial Prokaryotes? 9A Decomposers, Photosynthesizers, and Nitrogen fixers 10 Q Use table 27.1 to list 2 bacteria diseases?

Lecture Questions Chapter 27 CODE: CCXL 10A Plague Yersinia pestis Human; killed one-fourth of the population in Europe in the 14 th century Tuberculosis Mycobacterium tuberculosis Human; an acute bacterial infection of the lungs

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