SCI250 Week 5 Chapter 19 Integumentary System Quiz – Test Bank Section: Multiple Choice 1. The majority of the microorganisms on the surface of the human skin are ________ Gram-positive bacteria. Gram-negative bacteria. approximately equal numbers of Gram-positive and Gram-negative bacteria. Spore-forming bacteria. Enteric. 2. The outer layer of the skin is the _________ while the deeper layer is the _________ cutaneous‚ keratin. dermis‚ sebum. mucous‚ epidermis. epidermis‚ dermis. sebum‚ keratin
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Towards the center of the TSA plates were larger colonies and they appeared to be a little bit more spread apart than the colonies around the edges. I counted about 38 larger colonies. Next I looked at the TSA plate containing the bacteria Pseudomonas aeruginosa. This TSA plate displayed larger colonies around the edges and in the center. The colonies were more attached which made counting the colonies a bit difficult; however I was able to count about 33 colonies. Following‚ I moved on to my next
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communication is a central mechanism in bacteria cells because it provides examples of parasitism relationship among different organisms such as S. aureus. It gives a means to control infections through a complex mechanism which is found in Pseudomonas aeruginosa. This touches on some variety of processes‚ including genetic transfer‚ antibiotic production growth and pathogenesis. Many bacteria cells possess a unique communication system that allows them to exchange information within their own
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Oxidase positive c. Reduce Nitrate to Nitrite d. Ferment glucose with acid production 2. Which of the following organisms does not belong to the Enterobacteriaceae group? a. Shigella flexneri b. Eschericia coli c. Proteus mirabilis d. Pseudomonas aeruginosa 3. Name the four species of Shigella. 1. Shigella sonnei 2. Shigella dysenteriae 3. Shigella flexneri 4. Shigella boydii 4. Colonies that appear red with black centres on XLD are likely to be which of the following organisms:-
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basis for the oxidase test‚ and interpret reactions in the oxidase test. Purpose is to determine if the bacterium has cytochrome c oxidase in its electron transport chain. Materials: 1 paper towel‚ loops‚ oxidase reagent dropper‚ E.coli‚ Pseudomonas Aeruginosa. Procedure: Take each organism on a loop and add the oxidase reagent to each loop. The area with
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sterile loop‚ we streaked a single line of each culture Bacillus subtilis‚ Pseudomonal aeruginosa‚ and Escherichia coli‚ to each of the separate sections. The plate was incubated until the next lab period‚ where we then flooded the plate with Iodine and were able to observe and record starch Hydrolysis. (Table 1) * In order to test carbohydrate catabolism under anaerobic conditions we tested cultures of Pseudomonas aerugenosa‚ Escherichia coli‚ and Alcaligenes faecalis in tubes containing a glucose
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University Of Botswana DEPARTMENT OF BIOLOGICAL SCIENCES BIO111: Laboratory Exercise 8 The Mutagenic Effects of UV Light Name: sharon reakae INTRODUCTION A mutation is a permanent change in the DNA sequence of a gene. Mutation rates are usually very low but there are factors that can increase the mutation rates. These factors are referred to as mutagens and conclude a range of physic-chemical agents. UV light is a mutagen that affects all living things and has an adverse effect on the
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acts like a barrier‚ but now as it is damaged; bacteria can enter without difficulty and produce a life-threatening situation called sepsis. Infection is the most important reason of morbidity and mortality in burns. Staphylococcus aureus and Pseudomonas aeruginosa are the most frequently colonizing bacteria whereas group-a beta-hemolytic streptococci are the most virulent bacteria and anaerobic bacteria as well as fungi are also common‚ viral infection is less prevalent (3‚ 4).
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(30 mg/mL) and very high amount of red blood cells (Large+++) found in the urine. The bacterium identified in this specimen is Pseudomonas aeruginosa. This is confirmed by involving many tests and observation‚ such as Gram stain‚ oxidase test‚ catalase test and the observation of colony morphology on Horse Blood Agar‚ MacConkey agar and Tryptic Soy Agar. Pseudomonas aeruginosa is an opportunistic pathogen‚ known as the third most common pathogen associated with nosocomial infections‚ mainly
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Livja Koka Anaerobic Bacteria In this experiment the purpose is to seek understanding between an organism and its use of oxygen. Oxygen is a very important part of the organisms’ survival. Oxygen has a tendency to form very reactive by-products inside a cell. These by-products create havoc by reacting with protein and DNA‚ thus inactivating them. Cells that are able to live in the presence of oxygen have evolved enzymes to cope with H2O2 and O2- and thus are not inhibited by O2. Also many anaerobes
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