Final answer:
The optimal pH for pepsin activity is indeed 1.5, matching its acidic operational environment in the stomach. Raising the pH can detrimentally affect protein digestion due to reduced pepsin activity. Enzymes like pepsin are tailored to work best under specific pH conditions relevant to their biological context.
Step-by-step explanation:
You asked if the prediction about the optimal pH for pepsin activity was correct. The optimal pH for pepsin activity is 1.5, which is highly acidic. This is because pepsin functions in the stomach, which naturally has a low pH due to the presence of gastric acid. If the pH is raised significantly, pepsin would not be as effective, leading to reduced protein digestion. Extreme pH levels can denature proteins, impacting their structure and function.
A neutral pH is defined by a numerical value of 7.0 on the pH scale. Also, the DNA code does indeed carry instructions for the correct sequence of amino acids in a protein, phospholipids make up cell membranes, and proteins have a vast array of functions, including catalysis of biochemical reactions, structural support, and signaling.
In terms of physiological correlation, enzymes are adapted to function most efficiently at certain pH levels. For example, while many body fluids and enzymes operate at pH values between 6 and 8, pepsin is an exception as it operates in the highly acidic environment of the stomach. These specific adaptations are crucial for maintaining homeostasis and proper digestive functions within the body.