Use the following information to answer the question below.

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

Use the following information to answer the question below.

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

An enzyme from a bacterium that lives in a mildly alkaline hot spring at temperatures of 70°C or higher is likely to be adapted to those conditions. Curve 3 shows an enzyme that is active at high pH, which is consistent with the alkaline environment. Curve 5 shows an enzyme that is active at high temperatures, which is consistent with the hot springs environment. Therefore, the combination of curves 3 and 5 best represents the temperature and pH profiles of an enzyme from this bacterium.

Use the Following Information to Answer the Question Below