Consider the activity and specificity of the three enzymes. Pepsin is most active in the human and helps to digest .?

Pepsin is most active in the acidic environment of the stomach, where it helps to digest proteins into smaller peptides. Its optimal pH is around 1.5 to 2, making it effective in breaking down the complex protein structures found in food. Pepsin is secreted as an inactive precursor, pepsinogen, which is activated by the acidic conditions in the stomach. This enzyme plays a crucial role in the initial stages of protein digestion before they are further broken down in the small intestine.