Question

1. explain why a key that fits into a lock is a useful model for the function of an enzyme.
2. explain how consuming an acid neutralizing antacid might affect protein digestion. apply the concept of activation energy to support your explanation.
3. predict which temperature (20°c, 39°c or 50°c) would you expect a human enzyme to function best. plan a simple experiment to test your hypothesis.

Explanation:

For 4, it's based on enzyme - substrate specificity. For 5, pH affects enzyme function and activation energy. For 6, body - temperature is optimal for human enzymes, and reaction rates can test the hypothesis.

Answer:

1. Enzymes have specific - shaped active sites like a lock, and substrates fit like keys, enabling specific reactions.
2. Antacids raise pH, changing enzyme - substrate interactions. Lowering acidity may increase activation energy for protein digestion enzymes.
3. 39°C as it's close to human body temperature. Experiment: Set up three reaction vessels with human enzyme and substrate at 20°C, 39°C, 50°C; measure reaction rates.