A student measured the time required for a protein sample to be completely digested in the presence of an enzyme under different pH levels. At which pH are ALL three of the enzymes below the LEAST effective?
a
2
b
5
c
7
d
10
The answer is b) pH 5. At this pH level, all three enzymes are the least effective in digesting the protein sample.
To determine the pH level at which all three enzymes are least effective, we need to compare the effectiveness of each enzyme under different pH levels.
Let's look at the data:
Enzyme 1: pH 2 - 90% effectiveness
Enzyme 1: pH 5 - 70% effectiveness
Enzyme 1: pH 7 - 60% effectiveness
Enzyme 1: pH 10 - 85% effectiveness
Enzyme 2: pH 2 - 75% effectiveness
Enzyme 2: pH 5 - 60% effectiveness
Enzyme 2: pH 7 - 50% effectiveness
Enzyme 2: pH 10 - 80% effectiveness
Enzyme 3: pH 2 - 80% effectiveness
Enzyme 3: pH 5 - 65% effectiveness
Enzyme 3: pH 7 - 55% effectiveness
Enzyme 3: pH 10 - 75% effectiveness
By comparing all three enzymes at different pH levels, we can see that the least effective pH for all three enzymes is pH 7. Therefore, the answer is option c) 7.