Enzyme activity- Question 3 A group of students conducts research on enzyme activity and collects the data shown in the graphs. Enzyme activity 10 15 20 25 30 35 40 45 50 Temperature 0246 8 Which statement is supported by the evidence in the graphs ? a Ob The enzyme's activity is greatest at pH 7 and would not be affected by a change in temperature . The enzyme works best in a pH range of 6 to 8 and at a temperature of approximately 37C. The enzyme functions well at a temperature of 35 C and would be active at any pH value . The enzyme is very active at approximately 42C and within a pH range of 2 to 6

Answer 1

Based on the options provided, the correct statement would be:

"The enzyme works best in a pH range of 6 to 8 and at a temperature of approximately 37C."

This statement is generally supported by the behavior of many enzymes, which typically show optimal activity within a specific pH range and temperature. Enzymes often have peak activity at physiological temperatures (around 37°C for human enzymes) and usually function best at a neutral pH, which is typically around 6 to 8.

The other statements are less likely to be supported by typical enzyme activity data:

• The first statement suggests insensitivity to temperature changes, which is generally not true for enzymes.
• The third statement claims good function at 35°C but does not define the optimal pH, which is often crucial to enzyme activity.
• The last statement suggests high activity at 42°C and an acidic pH range, which is atypical for many enzymes.

Therefore, the second option is supported by standard enzyme activity evidence.