Question

iew History Bookmarks Window Help MHE Reader Chapter 6 Homework Help ework Match the term with the appropriate description to test your understanding of terminology regarding temperatu preferences of microorganisms. Describes an organism that grows optimally at temperatures ranging from 0°C to 15 C psychrophile Describes an organism that has an optimum growth temperature >20°C, but is able to grow slowly at colder temperature Describes an organism that grows optimally at temperatures ranging from 20"C to 40 C Describes an organism that grows optimally at temperatures ranging from 45°C to 80°C psychrotroph Describes an organism that grows optimally at temperatures ranging from 80 C to 120 C hyperthermophile <Prev 100' 20İİİ Next>

Answer 1

Psychrophile

A microorganism that has an optimum temperature below 15 degree Celsius and is capable of growth at 0 degrees Celsius.
-True forms of these cannot grow above 20 degrees Celsius.

Mesophile
An organism that grows at intermediate temperatures.
-Optimum growth temperature of most is between 20 and 40 degrees Celsius.
-Temperate, subtropical, and tropical regions.
-Most human pathogens have optima between 30 and 40 degrees Celsius

Thermophile
A microbe that grows optimally at temperatures greater than 45 degrees Celsius.
-Vary in heat requirements.
-Generally range of growth of 45 to 80 degrees Celsius.
-Hyperthermophiles grow between 80 and 120 degrees Celsius.

Psychrotroph
Cold‐tolerant bacteria or archaea that have the ability to grow at low temperatures, but have optimal and maximal growth temperatures above 15 and 20°C, respectively.

Hyperthemophile
An organism that thrives in extremely hot environments—from 60 °C (140 °F) upwards. An optimal temperature for the existence of hyperthermophiles is above 80 °C (176 °F).

Choose the term that describes an organism that lacks superoxide dismutase and catalase enzymes to test your understanding of the role of these enzymes in microbial growth

Answer = Obligate anaerobe