Discussion
Organisms that tolerate low temperature and can grow under refrigeration are called :
Answer: B
Organisms that grow at refrigeration temperature are called psychrotrophic.
Psychrotrophs have an optimum above 20 °C but can still multiply slowly at 0-7 °C, which is why they spoil refrigerated milk, meat and fish. Pseudomonas and Listeria are common examples.
Thermoduric organisms survive heat treatment such as pasteurisation without necessarily growing at high temperature. Mesophiles grow best at about 20-45 °C, the range of body and room temperature, and do not grow well in a refrigerator. 'Thermotropic' is not a term for a growth group of microorganisms.
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