Worksheets12 Physical & Environmental Requirements for Growth - MicroCore
Total questions: 10
Worksheet time: 5mins
Which of the following elements are required by microorganisms?
Carbon
Nitrogen
Sulfur
Potassium
All of the aforementioned elements are required
Generally, what is the temperature requirement of human pathogenic bacteria?
Thermophiles
Mesophiles
Psychrophiles
Psychrotrophic
Halophiles
Which of the following terms best describes microorganisms that can spoil refrigerated foods?
Psychrotrophic
Mesophilic
Anaerobic
Halophiles
Acidophile
What part of the cell becomes fluid when subjected to high temperature?
Nucleoid
Cytoplasm
Cell membrane
Cell wall
Toxic forms of oxygen are detrimental to which group of bacteria?
Obligate aerobe
Microaerophile
Facultative anaerobe
Obligate anaerobe
Which of the following statements is true about pH as one of the factors affecting the growth and survival of microorganisms?
The optimum pH of an individual pertains to its preferred external and internal pH
No matter what extracellular pH a microorganisms prefers, the intracellular pH should be maintained near neutrality
An acidophile can grow at pH 5.8
One critical factor governing acidophily is the stability of the cytoplasmic membrane
Pseudomonas aeruginosa is a common pathogen that infects the airways and lungs of patients with cystic fibrosis disease. Given its preferred site of infection, the bacterium is probably a/an:
Obligate aerobe
Aerotolerant anaerobe
Obligate anaerobe
Facultative anaerobe
Which type of microorganisms can grow over wide ranges of water activity?
Halophile
Alkaliphile
Neutrophile
Osmotolerant
Which of the following is NOT true about obligate aerobes?
Require oxygen for growth
Lacks superoxide dismutase and catalase
Uses oxygen as final electron acceptor in aerobic respiration
All of the choices are true about obligate aerobes
What do you call microorganisms that live in dry environments?
Xerophiles
Halotolerant
Neutrophiles
Osmotolerant
Nikaphiles
