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12. Microbial population is most uniform in terms of chemical and physical properties during the exponential phase of growth. A. True B. False
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- 12/ Which of the following factors increases biofilm accumulation? (select all that apply) V A. malocclusion V B. smooth surfaces V C. calculus V D. restorations E. use of fluoridated 9/ During biofilm formation, microcolonies form in layers as the bacterial colonies multiply. With increased size, colonies meet and coalesce to form a complex microbial community. © A Both statements are true. A © B Both statements are false. C. The first statement is true, and the second statement is false. D. The first statement is false, and the second statement is true. Question 11 Which of the following is found in a disease periodontal pocket? © A Gram positive cocci and lactobacillus species. O B. Primarily jam negative motile rods and spirochetes • C. Gram positive aerobes © D. Keystone pathogens.3. Internet search for microbial colony descriptive terms to be used in your colony characterization. a. Whole colony shape b. Size of colony c. Edge/margin of colony d. Chromogenesis or pigmentation e. Opacity of colony f. Elevation of colony g. Surface of colony h. Consistency or texture of colonyAccording to the Liebig's Law of Minimum, which condition of certain growth factor limits growth of microorganisms? * A. factor in abundance B. factor in optimal C. factor in minimum D. factor in maximum 2. Growth is best when microbes are incubated at ______ level within its tolerance range. * A. minimum B. maximum C. optimum D. magnanimous 3. At what phase of microbial growth when microbial growth and reproduction is fastest? * A. death phase B. log phase C. lag phase D. stationary phase 4. Most human pathogens are ______ with regard to temperature range of tolerance for optimum growth. * A. thermophiles B. mesophiles C. psychrophiles D. xerophiles 5. Which adaptations are developed by thermophiles to withstand extremely high temperature? Check all that apply. * ( ) high proportion of unsaturated fatty acids in the cell membrane ( ) high cytosine-guanine nitrogenous bases ( ) more saturated fatty acids in cytoplasmic membrane ( ) heat-stable enzymes
- 9. Which is statement below is the correct definition of the Sterility Assurance Limit (SAL). Select ONE answer. O The Sterility Assurance Limit (SAL) is a numerical value that predicts the probability that a microorganism has survived a pasturization process. O The Sterility Assurance Limit (SAL) is a numerical value that confirms that a microorganism has survived a sterilisation process. O The Sterility Assurance Limit (SAL) is a numerical value that predicts the probability thaț a microorganism has survived a sterilisation process. O The Sterility Assurance Limit (SAL) is a numerical value that confirms that a microorganism has survived a pasturization process. O The Sterility Assurance Limit (SAL) is a numerical value that predicts the probability that a microorganism has been erradicated during a sterilisation process1. Discuss two direct methods in determining microbial population. Discuss it comprehensively and please, do not just copy form somewhere.2. As an aspiring Nurse, the need for the culture of a new pathogenic microorganism in the laboratory has been allocated to you. Applying all the guidelines involved in the successful isolation and cultivation of microbes, discuss the culturing system that is most appropriate for this activity and state your reason(s) for this choice
- 1. What substance is produced by a microorganism that is capable of the growth of other microorganisms? Give a concrete example of your answer. 2. In what way does the use of antibiotics contribute to the problem of the emergence of drug-resistant microorganisms? 3. What does the zone of inhibition imply? Does the measurement of the zone of inhibition imply that one antibiotic is better than the other? Support your answer.AsapMicroorganism growth in complex natural environments such as soils and waters can be utilized to carry out environmental management processes. Give one term for the process you would use to cleanse a marine oil spill and discuss at least 3 types thereof. Outline factors that would facilitate the success of the process you mentioned on 1. Discuss the use of indicator organisms in testing the quality of drinking water.
- A. Bacterial Growth Curve Categorization. Drag and drop the microbial culture plates on the column that best represents the bacterial colony growth phase. -Number of Bacterial Cells (Log) ➡➡➡ Lag Exponential Phase Phase Stationary Phase Time (h) 24 Death Phase 481. Which of the following micro-organisms are the most resistant to heat sterilization? a. Vegetative bacteria (e.g., Samonella spp.) b. Spore-forming mesophilic bacteria (e.g., Clostridium botulinum) c. Spore-forming thermophilic bacteria (e.g., Bacillus stearothermophilus) d. Toxicogenic bacteria (e.g., E. coli O157:H7) e. All of the above are equally resistant to heat sterilization.1. What are the colony shape, margin and elevation of colony of nutritient agar exposed in these types of exposure A. Soil B. Water C. Plant leaves D. Air