MICROB 3200 Lecture Notes - Lecture 1: Septic Shock, Diplococcus, Clostridium

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crimsonfox254

12 Sep 2017

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Describe the functions of specific bacterial structures and their roles in pathogenesis. Know the structures that are targeted by antibiotics. Single celled microbes can belong to any of the three domains of life ex. eukarya, archea, bacteria, Just because you are a single celled does not mean you are a bacteria. Bacterial cell morph: spherical cells (coccus, cocci) Sphere or short rod: rod shaped (bacillus, bacilli) Forms within a cell; not a form of replication. Each endospore germinates to form one vegetative cell. Can germinate and produce regular bacteria and undergo binary fission. Extremely resistant to drying, heat, radiation and disinfectants. When you wash purple away-it easily goes away. Gram stain not used for: atypical cell walls. Waxy later on the outside that stops the strain from getting in. Acid-fast bacteria (afb) resist decolorization with acid-alcohol and stain red, the color of the initial stain, carbol fuchsin. Other bacteria will be decolorized and stain blue with counterstain methylene blue ex.

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17. What is citizen science? a) Science projects in which scientists study citizen b) Science project in which citizens are trained to become scientists in the future c) Science projects in which the public participates by collecting data, analyzing data, or participating as subjects d) Science projects in which scientists study the nature of being a good citizen

18. When considering the evolutionary tree of life and the three domains of life, which statement best describes what likely happened over the course of millions of years of evolution? Choose one:

A. Bacterial and eukaryotic cells are more closely related to each other than to archaeans, as evidenced by the fact that bacteria and eukaryotes do not inhabit the most extreme environments.
B. Although their cell structures are very different, archaean and eukaryotic cells are more closely related to each other than to bacteria, as evidenced by the fact that Bacteria was the first domain to split from the shared ancestor of Archaea and Eukarya.

C. Bacteria and archaeans are more closely related to each other than to eukaryotes, as evidenced by their cell structures. Bacteria and archaeans are prokaryotic, while all eukaryotic cells contain mitochondria and other membrane-bound organelles.
D. The three domains of life are equally divergent from one another, so no two domains are more closely related to each other. This is supported by the evolutionary tree of life because three branches extend from one node millions of years ago.

MICROB 3200 Lecture Notes - Lecture 1: Septic Shock, Diplococcus, Clostridium

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