1. Phenylethyl alcohol (PEA) agar is a selective media. Which of the following organisms should NOT grow well on PEA agar? Choose all that apply. Klebsiella pneumoniae Staphylococcus aureus Escherichia coli  Streptococcus pneumoniae Bacillus cereus 2.  Phenol red, a pH indicator, is a component of some differential media. Phenol red is a red at neutral and basic pHs and turns yellow at acidic pHs. Which of the following conditions would result in a yellow color in a medium containing lactose and phenol red? A.Growth of an organism that ferments glucose to alcohol. B. Growth of an organism that ferments mannitol but not lactose. C. Growth of an organism that ferments lactose to lactic acid. D. Growth of an organism that is not capable of fermenting any sugars.

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Microbial Growth

The development of microbial growth is influenced by various natural conditions (both physical and synthetic) like pH, temperature, saltiness, gas focus (O2, CO2, and H2), nutrients, water action, and assimilation. Knowing the distinctive physical and chemical factors that influence the development and endurance of microbial growth in the climate will assist with reinforcing endeavors outfitted towards their control. These lines lessen or diminish their harmful impacts on humankind, creatures, and the climate.