Identifying Unknown Bacteria Using Biochemical and Molecular Methods Beginning of Instructor Pages Instructor Pages - - 3 Purpose The purpose of this lab is to introduce a variety of lab techniques to students working on the common problem of identifying an unknown bacterium. This lab helps students develop an understanding of the biochemical and molecular differences in bacteria and introduces the concept of identifying species based on characeristic gene sequences. Students work through
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Isolation and Study of Organelles from Pea Seeds by Differential Centrifugation and Corn to Determine Mitochondrial Activity BIOL 230-01 Cell & Molecular Biology October 13‚ 2014 ABSTRACT Since the discovery of the cell in 1665 by Robert Hooke‚ man has always wondered about the complexity and potential functionality. Using pea seeds‚ which is readily available‚ we will be studying the different parts of the cell by separating it into its component parts by
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Introduction- This lab experiment serves as a model for community succession using bacterial colonies as the model. A bacterial colony grows from a single bacterium and is composed of millions of cells. Each colony has distinctive colony morphology: size‚ shape‚ color‚ consistency‚ and color. Community succession is a phenomenon observed in the organizational hierarchy of all living organisms. Community succession is not limited to bacterial colonies‚ but spans the entire community of life
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Gut Bacteria In today’s world‚ many people have a very negative connotation when they hear the word “bacteria”. Bacteria have been the cause to many diseases‚ however bacteria do have some benefits and uses. There are thousands and thousands of different types of bacteria in the world and one group of bacteria‚ Gut Flora‚ has become evident in the bacterial community for being beneficial. Gut Flora is a group of bacteria that consists of microorganisms that live in the digestive tracts of animals
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shapes as before‚ just with sharper outlines. Questions: A. What are the advantages of using bleach as a disinfectant? The disadvantages? The advantages of using 70% alcohol? The disadvantages? 70% alcohol mixtures are capable of killing most bacteria within five minutes. However‚ the mixture is ineffective against spores and has limited effect on viruses. Additionally‚ the 70%
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Bacteria and Archaea Bacteria and Archaea All single-celled organisms in the Bacteria and Archaea domains are referred to as prokaryotes. Prokaryotes are organisms whose genetic material is not contained within a nuclear envelop. These cells are profoundly important to the environment‚ medicine‚ and industry. (Postlethwait & Hopson‚ 2010‚ p. 196) Bacteria and Archaea are similar in shape‚ size‚ and appearance. They are both found occurring as rods (bacilli)‚ spheres (cocci)
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is researching a newly-discovered species of bacteria. At time t = 0 hours‚ he puts one hundred bacteria into what he has determined to be a favorable growth medium. Six hours later‚ he measures 450 bacteria. a. Assuming exponential growth‚ what is the growth constant "k" for the bacteria? (Round k to two decimal places.) b. After 10 hours‚ how many bacteria will there be? c. When will there be 10‚000 bacteria? 10. A certain type of bacteria‚ given a favorable growth medium‚ doubles in
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Isolation of Pure Cultures by Dilution Techniques and Gram Staining Method Results Table 1. Gram stain reaction and cellular features of the culture. Gram staining methods were applied on the given mixture of Bacillus cereus‚ Escherichia coli and Staphylococcus aureus and then examined microscopically. Results were recorded in Table 1. Gram Reactions Cell shapes Cell Ends and Arrangement Size Distinctive Characters Predicted Bacteria Bacteria 1 Gram positive (purple) Cocci Rounded‚ clusters
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treatment. Teaching infection control through learning of isolation precaution can decrease the spread of infection in critical care units. The goal of this project is to ensure each person understands the different isolation precautions and practices to minimize the spread of these bacteria to staff‚ visitors and other patients in this unit. Nurses can educate and reinforce protocols to those individuals who need further teaching regarding isolation. The overuse of antimicrobial agents is one of the
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Mixed Fractions (Also called "Mixed Numbers") | | A Mixed Fraction is a whole number and a proper fraction combined. such as 1 3/4. | 1 3/4 | | | (one and three-quarters) | | | Examples 2 3/8 | 7 1/4 | 1 14/15 | 21 4/5 | See how each example is made up of a whole number and a proper fraction together? That is why it is called a "mixed" fraction (or mixed number). Names We can give names to every part of a mixed fraction: Three Types of Fractions There are three types
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