During the pre-steady state period, how do the concentrations of enzyme-substrate complex and product change?

• A. Enzyme-substrate complex concentration increases, and product concentration increases.
• B. Enzyme-substrate complex concentration decreases, and product concentration remains constant.
• C. Enzyme-substrate complex concentration decreases, and product concentration decreases.
• D. Enzyme-substrate complex concentration remains constant, and product concentration decreases.

Answer: (A)