Thermophiles are microorganisms that thrive at temperatures above 40 °C. Which of the following characteristics LEAST accurately describes an enzyme isolated from a thermophile?A.Its optimal catalytic activity occurs above 40 °C.B.It is resistant to thermal denaturation.C.It has a relatively low catalytic rate at room temperature.D.It loses tertiary structure at temperatures below 37 °C.
Question
Thermophiles are microorganisms that thrive at temperatures above 40 °C. Which of the following characteristics LEAST accurately describes an enzyme isolated from a thermophile?A.Its optimal catalytic activity occurs above 40 °C.B.It is resistant to thermal denaturation.C.It has a relatively low catalytic rate at room temperature.D.It loses tertiary structure at temperatures below 37 °C.
Solution
The characteristic that LEAST accurately describes an enzyme isolated from a thermophile is D. "It loses tertiary structure at temperatures below 37 °C."
Here's why:
A. "Its optimal catalytic activity occurs above 40 °C." - This is accurate. Thermophiles thrive at temperatures above 40 °C, so it makes sense that the enzymes they produce would also function optimally at these higher temperatures.
B. "It is resistant to thermal denaturation." - This is also accurate. Enzymes from thermophiles need to be able to withstand the high temperatures at which these organisms live. Therefore, they would have evolved to be resistant to denaturation (loss of structure and
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