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 51°c) would you expect a human enzyme to function best. plan a simple experiment to test your hypothesis.

Explanation:

For 4, enzyme - substrate specificity concept. For 5, pH affects enzyme activity and activation energy. For 6, human enzymes work best near body temperature; experiment measures rate at different temps.

Answer:

1. Enzymes have specific - shaped active sites like a key - lock fit for substrates.
2. Acid neutralizing antacid may raise pH, increase activation energy for protein - digesting enzymes, slowing digestion.
3. Expect 39°C as it's close to human body temp. Experiment: Prepare enzyme - substrate mixtures at 20°C, 39°C, 51°C; measure reaction rates.