Because, Amylase is the main emzyne in saliva that converts starch into sugar and the average pH of saliva is 7.
Most human enzymes work at a optimal pH of 7.4, but other enzymes work at many different pH ranges, for example Pepsin works best at an optimal pH of 2.6 and Trypsin works best at an optimal pH of 7.8.
Amylase, an enzyme that breaks down starch into simpler sugars, works best at a neutral pH around 7 because its active site is most stable at this pH. Enzymes are sensitive to changes in pH, and deviations from the optimal pH can disrupt the enzyme's structure and function. At a pH of 7, amylase can efficiently catalyze the hydrolysis of starch into maltose and glucose.
That they work best in the right pH and temperature they were made to work in. Amylase works best in the mouth's pH of about 7, while pepsin works best at a much lower and acidic pH.
Amylase has an optimal pH range of 6.7 - 7.0 and an optimal temperature of around 37 degrees Celsius or 98.6 degrees Fahrenheit. This is what would be expected of an enzyme that needs to be in its most active form in the saliva of the mouth.
The optimum pH is neutral, 7.
Oh, dude, the optimum pH for amylase activity is around 6.7. It's like the sweet spot where this enzyme is like, "Yeah, I can break down some starches here." So, if you want your amylase to do its thing, keep it chill around pH 6.7.
Because of enzyme specificity, enzymes require certain temperatures and pH's to work. Now I don't think there is a temperature change, but there is most certainly a pH change as the mouth has a near neutral pH while the stomach has a more acidic pH of about 2-3.
The best numbers are 6.7-7. You can sometimes get it to work in other pH numbers, but these are the easiest for you to get it to occur.
In the stomach, the pH could be as low as 2. Pepsin is an enzyme that breaks up protein molecules. It needs to have an optimum pH close to that. In the mouth, amylase occurs. pH in the mouth is often about 7. Optimum pH for amylase needs to be close to that.
The activity of salivary amylase is highest around neutral pH, typically between pH 6.5 to 7.5. Any significant deviation from this pH range can lead to a decrease in enzyme activity.
Catalase works best at a pH of around 7, which is considered neutral.
The optimal pH for salivary amylase is around 6.7, which is slightly acidic. At this pH, salivary amylase functions most efficiently in breaking down starches into simpler sugars like maltose. Any significant deviations from this pH can affect the enzyme's activity.