Mesophiles - Study guides, Class notes & Summaries

Chlorine and iodine are classified as - halogens Obligate aerobes can only live - when oxygen is present Microorganism found thriving in a the permafrost region of the Arctic are - pychrophiles Facultative halophiles - tolerate an elevated salt concentration in the environment Most bacteria prefer to grow at which pH range? - Most bacteria prefer to grow at which pH range? The spectrophotometer is used in microbiology to - indirectly measure microbial growth Pyrimidine dimers are formed i...

A form of asexual reproduction in single-celled organisms by which one cell divides into two cells of the same size - Binary Fission Enzymes, toxins, and other factors that affect the relative ability of a pathogen to infect and cause disease. - Virulence factors Gram staining differentiates bacteria based on their: A) ATP B) endospore C) cell wall D) integral proteins - Cell Wall Reactions that require energy are called ________ reactions: A) endergonic B) endothermic C) exergonic ...

3 food safety concerns correct answers biological (illness, GMO) chemical (natural toxins, metals, additives) physical concerns (glass, metal, wood) food safety concerns ranked by actual risk correct answers foodborne illness, nutritional adequacy, environmental contaminants, natural toxins, pesticides residues, food additives bacteria correct answers one celled, distinguished by shape, spores 4.6-9.0 pH, all temp, Aw >9.1, aerobic, anaerobic, and facultative yeast correct answers...

CRCST Practice Exams-Sect. 1 (Cleaning, Decontamination, and Disinfection) with Complete SolutionsCRCST Practice Exams-Sect. 1 (Cleaning, Decontamination, and Disinfection) with Complete SolutionsCRCST Practice Exams-Sect. 1 (Cleaning, Decontamination, and Disinfection) with Complete SolutionsCRCST Practice Exams-Sect. 1 (Cleaning, Decontamination, and Disinfection) with Complete Solutions thermal disinfection - ANSWER-What type of disinfection uses heat to kill all microorganisms with the exce...

CRCST Exam Test Prep #3 Questions and Answers 100% CorrectCRCST Exam Test Prep #3 Questions and Answers 100% CorrectCRCST Exam Test Prep #3 Questions and Answers 100% CorrectCRCST Exam Test Prep #3 Questions and Answers 100% CorrectWicking materials are used to: - ANSWER-Allow air removal, steam penetration and facilitate drying bacteria that are often pathogenic to humans because they grow well at body temperature - ANSWER-Mesophiles Which of the following is used for real time tracking o...

BI 234 CH. 7 EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE Listeria monocytogenes can grow slowly in your fridge, w/ optimum temp range 30 to 37degrees C, what is it? Psychrotroph Psychrotrophs are cold-tolerant organisms that can grow at about 0-30°C. These organisms are commonly associated with foodborne illness because they grow at room temperature as well as in refrigerated and frozen foods. Listeria monocytogenes readily grow in refrigerated foods and can...

Microbiology Ch. 6 Questions And Answers. Microbes have very narrow optimum temperature ranges. Which of the following classifications of microbes are most likely to cause human disease, based on temperature requirements? hyperthermophiles thermophiles mesophiles psychrophiles - CORRECT ANSWER Mesophiles - The temperature range of mesophiles overlaps that of normal human body temperature, allowing the greatest growth. Which of the following statements accurately describes the cul...

MIC 205 Exam 3 Questions with All Correct Answers Psychrophiles - Answer-cold-loving microbes Mesophiles - Answer-those growing best between 20 degrees and 40 degrees celcius; the human pathogens are in this group Thermophiles - Answer-heat loving microbes minimum growth temperature - Answer-the lowest temperature at which the species will grow optimum growth temperature - Answer-the temperature at which the species grows best maximum growth temperature - Answer-the highest temp...

What is microbial growth? - increase in the number of cells What are the two general requirements for microbial growth? - physical: temperature, pH, osmotic pressure chemical: types of nutrients, growth factors A bacterium has just encountered a new environment. What are its three basic choices with respect to growth in this new environment? - Adapt- allows growth to continue Tolerate- survive without growth DIE What are a bacterium's cardinal temperatures? Do all bacteria have the same...

Chapter21 Question and answers 100% correct Chapter 6-Microbiology What are the physical requirements for microbial growth? - correct answer Temperature, pH, and osmotic pressure Temperature - correct answer Most microorganisms grow well at the temperatures that humans favor; but there are three major ranges of temperature: psychorophiles, meosphiles, thermophiles psychorophiles - correct answer cold-loving microbes (-10 to 20) Mesophiles - correct answer moderate-temperatur...