Question

match each letter in the image with the correct label.

Explanation:

• Enzymes are biological catalysts. In the lock - and - key model (a common model for enzyme - substrate interaction), the enzyme (B) has a specific active site.
• The substrate (A) is the molecule that the enzyme acts on. It fits into the active site of the enzyme.
• When the substrate binds to the enzyme at the active site, an enzyme - substrate complex (D) is formed.
• After the reaction, the products (C) are released from the enzyme.

Answer:

A. Substrate, B. Enzyme, C. Product, D. Enzyme - Substrate Complex