-Activity of various enzymes at various temperatures (a) and at various pH (b)
Which curves on the graphs may represent the temperature and pH profiles of an enzyme taken from a bacterium that lives in a mildly alkaline hot springs at temperatures of 70°C or higher?
A) curves 1 and 5
B) curves 2 and 5
C) curves 3 and 4
D) curves 3 and 5

Question

-Activity of various enzymes at various temperatures (a) and at various pH (b)
Which curves on the graphs may represent the temperature and pH profiles of an enzyme taken from a bacterium that lives in a mildly alkaline hot springs at temperatures of 70°C or higher?
A) curves 1 and 5 
B) curves 2 and 5 
C) curves 3 and 4 
D) curves 3 and 5

Quizplus · Accepted Answer

Curve 3 shows high activity at high temperatures, which is consistent with a bacterium that lives in a hot spring. Curve 5 shows high activity at mildly alkaline pH values, which is consistent with the environment in which the bacterium lives. Therefore, the best choice for the temperature and pH profiles of an enzyme from this bacterium is curves 3 and 5.

-Activity of Various Enzymes at Various Temperatures (A) and at Various