Q: Lactose fermentation can be used to distinguish between which of the following? Bacteria of the…
A: Fermentation is one of the earliest food processing processes. Lacto-fermentation is a type of…
Q: Which antimicrobics would be suitable for the control of the following organisms?S. aureus:E.…
A: Bacteria are single-celled and very small organisms. They found in water, human gut, soil, air,…
Q: Which has a greater impact on the survival of an organism, temperatures above its maximum…
A: The microbes grow in a wide temperature range. The microbial growths are found to be higher at their…
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A: Microbiology is the branch of biology that deals with study of organisms that are too small to be…
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A: Certain bacteria are able to survive high salinity, some are able to survive at low pH while some of…
Q: lists the major contents of the bacterium Escherichia coli.
A: The member belongs to the large group of unicellular microorganisms that have cell walls but lack…
Q: Determine the optimal pH (or range of pH) for: Escherichia coli and Staphylococcus aureus
A: Several factors like temperature, pH ,food etc determine the growth and survival of an organism.
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A: Enzymes are also known as bio-catalysts because it acts as a catalyst in living beings. Hence, an…
Q: Describe the basic effects of temperature on microbes.
A: The microorganism or microbes are characterized by their existence in the form of a single-cell or…
Q: Discuss the importance of some bacteria to undergo starvation during stationary phase and importance…
A: The importance of some bacteria to undergo starvation during stationary phase is that : In…
Q: Which of the following bacteria can survive in in temperatures ranging from 39°F (4°C)---to 99°F…
A: Bacteria are single-celled microorganisms that can be found in every environment on Earth. They are…
Q: Which of the following is capable of oxidizing elemental sulfur to sulfates? Bacillus GSB and PSB…
A: Plants and animals require a continuous supply of sulphur and its compounds in order to synthesise…
Q: Use the following chart (dichotomous key) to identify the enteric bacterium A, B and C: (5 marks)…
A: To identify: To identify the enteric bacterium A,B and C using the given chart.
Q: Show a diagram of beta-hemolysis and alpha-hemolysis by different bacteria on blood agar and explain…
A: Hemolysis is the process by which red blood cells in the blood are broken down by chemicals or by…
Q: Pseudomonas aeruginosa is capable of aerobic respiration and anaerobic respiration but not…
A: SIM test stands for Sulfur, Indole and Motility test. Hence, this test allows the detection of…
Q: Describe how each of the following would appear when grown on EMB agar: a. Escherichia coli b.…
A: EMB stands for Eosin Methylene Blue. This media is used as a seletive stain for the gram negative…
Q: turned red after Zn Stayed colorless after Zn turned red after NI and NII Which bacteria possess…
A: Nitrate test is done in the organism to know where they can convert nitrate to nitrite or not. The…
Q: Why heat can kill microorganisms?
A: * Microorganisms are the organism that can seen only through using microscope.They consists of…
Q: A patient with stomach ulcers was treated with antibacterial antibiotics for H. pylori infection and…
A: Introduction: Ulcers: Ulcers are explained as the sores on the lining of the stomach or small…
Q: Describe the metabolism for each of the following Bacteriaand state whether the organism is an…
A: Bacteria are single-celled prokaryotes ubiquitous in nature. As such, they can be found in different…
Q: Escherichia coli but not Pyrolobus fumarii will grow at 40°C,while P. fumarii but not E. coli will…
A: Escherichia coli is a Gram-negative, rod-shaped, facultative anaerobic bacteria. It usually inhabits…
Q: Match the expected result (purple, red, or colorless) to the following descriptions of Gram-stained…
A: Gram-staining is a procedure of staining than can be used to differentiate between bacterial…
Q: Anaerobic bacteria produces which of the following inhibitory toxic product?
A: Anaerobic bacteria are those bacteria which do not require oxygen for their growth, cell division or…
Q: Using a textbook or a reputable internet source, find two Gram-positive pathogenic bacteria and two…
A: It is required to find gram-positive and two-gram negative pathogenic bacteria that are facultative…
Q: What are the cardinal temperatures for Escherichia coli? Towhat temperature class does it belong?
A: Escherichia coli is a microscopic organism, specifically a gram negative bacteria. It is a…
Q: hich of the following microorganisms has not been linked to UTI’s? E. coli Pseudomonas…
A: A urinary tract infection (UTI) is a bacterial infection that affects the urinary tract. This sort…
Q: If the temperature of the incubator were to be increased from 35 to 45°C, how would this affect the…
A: The growth of bacteria is influenced by many physical factors. Temperature is one of the significant…
Q: You have three nutrient broths: Isotonic (0.9% NaCl), 2% NaCl or 10% NaCl. Which would be preferred…
A: Bacteria are single-celled prokaryotic organisms that replicate through simple cell division. The…
Q: Microorganisms are involved in each of the following processes EXCEPT infection fog production…
A: Ans: Fog production
Q: Use the dichotomous key in Table 2 to identify a gram-negative rod that ferments lactose and uses…
A: Bacteria are ubiquitous, mainly free-living organisms with only one biological cell. They are indeed…
Q: Which of the following is true about heat fixation
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A: Typhoid fever is more common in non-industrial countries. Travelers to Asia, Africa, Eastern Europe…
Q: Which of the following test will be useful for initial distinction between Salmonella and…
A: Microbiology is the branch of biology that studies microorganisms. In microbiology, different…
Q: State something about Bt toxin.
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Q: Lactobacillus acidophilus ferments glycogen produced by the vaginal epithelium forming ________…
A: The question asks to fill the following blank:Lactobacillus acidophilus ferments the glycogen that…
Q: Suppose when you are performing a Gram stain procedure, you hav reversed the order of crystal violet…
A: A) E.coli it is a gram negative bacteria. Strain red or pink due to retaining the color staining…
Q: Pseudomonas aeruginosa is capable of aerobic respiration and anaerobic respiration but not…
A: Sulfide indole motility test: Sulfur Reduction Indole Production Motility
Q: Give two reasons for why heat fixing is used? Adherence of bacterial cells to the slide…
A: Haet fixing is the procedure in gram staining of the bacteria. This has to be done so that the…
Q: Briefly describe the E. coli cold shock response.
A: Shock proteins comprise the primary line of protection for cells presented with unpleasant…
Q: Identify, by metabolic type, microorganisms responsible for dissimilatory nitrate, sulfate, and iron…
A: Microbiology is the branch of biology that deals with study of organisms that are too small to be…
Q: Describe the proteins produced when cells ofEscherichia coli experience a heat shock. Of what…
A: Under a wide range of stress conditions like physicochemical factors influence the production of…
Q: To which of the following is the photosynthetic bacterium Chormatium most closely related? Explain…
A: The bacteria is the unicellular prokaryotic organism that maintains a definite shape since it…
Q: Describe the procedure for obtaining the minimuminhibitory concentration (MIC) for a chemical that…
A: The microbial susceptibility tests to the antimicrobial agents is done in the laboratory that helps…
Q: Microorganisms present on surface of skin and mucous membrane are killed by a chemical named as
A: Human skin provides the first line of non-specific defense against pathogens. The skin and mucous…
Q: You are given a mixed culture of 3 bacteria–Methicillin-resistant Staphylococcus aureus(MRSA),…
A: The pure culture consists of a single microorganism. This culture helps to easily evaluate the…
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- clostridium botulinum is a bacterium usually present in soil that may cause botulism. Briefly explain why one or few cells of a pathogenic bacterium, such as clostridium botulism, by itself typically does not secrete a toxin, despite the species as a whole being characterized as toxin producing.Staphylococcus aureus is non-motile, a facultative anaerobe, and a mesophile. At 37⁰C in abundant glucose, which incubation environment is more likely to produce the highest cell mass of S. aureus within two hours? Flask with aeration to add oxygen to the broth and shaking Flask left on the lab bench Flask grown in an anaerobic chamber that removes oxygen from the air around the flask Flask without aeration All will be equalName the bacteria (Clostridium botulinum) that causes botulism.
- Characterize and give a brief description of the following bacteria: Salmonella enteritis Yersina PestisDescribe the procedure for obtaining the minimuminhibitory concentration (MIC) for a chemical that isbactericidal for Escherichia coli. Contrast the action ofdisinfectants and antiseptics.Consider a gram-negative pathogen isolated from marine mammals. This pathogen is subjected to a series of tests and found to have the following characteristics: oxidase-positive, does not hydrolyze urea, produces indole, does not produce acetoin. Which of the following could it be? O Pasteurella mulocida O Klebsiella pneumoniae O Yersinia enterocolitical O Mannheimia haemolytica
- choose any microorganism except S. aureus (Staphylococcus aureus)Describe the metabolism for each of the following Bacteriaand state whether the organism is an aerobe or an anaerobe:Thiobacillus, Nitrosomonas, Methylomonas, Pseudomonas,Acetobacter, and Gallionella.Flasks A and B contain broth, and are inoculated with an identical number of bacteria that are facultative anaerobes. Flask A contains a triglyceride lipid as the sole nutrient source, and Flask B contains a monosaccharide called fructose as the sole nutrient source. Both flasks are incubated at 30°C with aeration (oxygen is added to the broth). Assume the bacteria are capable of catabolism of both fructose and triglycerides. Mark all the correct statements pertaining to these cultures. A. Under anaerobic conditions, cells in flask A will produce more ATP B. Cells from flask B will produce more carbon dioxide C. Cells from flask B will produce more ATP D. Flask A will have the greater cell mass E. Cells from flask A will produce more ATP F. Cells from flask A will produce more carbon dioxide G. Flask B will have the greater cell mass H. Under anaerobic conditions, cells in flask B will produce more ATP
- Escherichia coli but not Pyrolobus fumarii will grow at 40°C,while P. fumarii but not E. coli will grow at 110°C. What ishappening (or not happening) to prevent growth of eachorganism at the nonpermissive temperature?Which antimicrobics would be suitable for the control of the following organisms?S. aureus:E. coli:P. vulgaris:P. aeruginosa:Name two methods of control of growth for Mycobacterium tuberculosis pathogen in a patient with the disease and when confronted with the pathogen outside of the host. Be careful to specify if it is a physical method or a chemical method (check lecture to differentiate these two). Control of growth means how would you deal with an infection related to a person as well as how would you minimize the presence of the bacteria on a surface or object.