MGY377H1 Lecture : Lecture notes

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redtermite204

23 Dec 2011

School

UTSG

Department

Molecular Genetics and Microbiology

Course

MGY377H1

Professor

William Navarre

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Document Summary

Body site is sterile brain, completely sterile because of blood-brain barrier not stomach, which is almost sterile. Dna or rna or combination of both. Do not metabolize things, relatively inert, need host cells to take over and make progeny. Bacteria are cells: have own metabolism, have ribosomes, have rna/dna bacteria. Metabolism - break down what s ingested, turn it into something. Do not need host cell, in theory to reproduce: some bacteria require host but not using host rna and dna enzymes for reproduction. Can move autonomously have appendages, flagella or villi how move, how direct movement. Sense environment and respond to it: product of four billion years of evolution, v. well adapted to environment. If something changes in env, can change transcription and proteins accordingly to do better in that environment: living cells that can communicate with each other and environment and can evolve (viruses can also evolve) Life style starts at a fruiting body.

Related Questions

Characteristics of Living Things (50 points)

Living things share 8 characteristics (listed in Chapter 1 of your textbook on page 19). A living thing grows, undergoes metabolism, responds to its environment, reproduces, passes DNA to the next generation, maintains homeostasis, changes over time, and is made up of cells. A non-living thing may seem to do one or more of these things, but to be classified as living; all eight characteristics must be present. Sometimes, you may see something that seems alive but is not. Though you canât see it, you have likely experienced it; one of those things is a virus.

Answer BOTH of the following questions:

Using all 8 of the characteristics that define life, indicate which one(s) viruses have and which one(s) they do not, and explain each difference.

With these results, present an argument that a virus is a living thing. Then, present the opposite argument that viruses are not alive.

. Bacteria can generate energy using a variety of different electron transport chain components depending on the environment. a. List the three common components of most electron transport chains? b. Under what environmental condition would a bacterium shift its metabolism from aerobic organotrophy to aerobic lithotrophy? c. Which component(s) of the respiratory chain from 4a would change under the environmental conditions of 3b? d. Define âreverse electron flow.â What is the product and why is this process necessary?

tantoad67

Bacteria are major players in biogeochemical cycles. Give examples of different environments and the relative abundance of bacteria in each. Describe the way in which the environment will determine the rate at which nutrients become available through impacts on bacteria.

Your response should be at least 200 words in length.â

MGY377H1 Lecture : Lecture notes

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