Evaluate the following scenario: A reaction in a biological system has a rate constant with units of s^-1. What can you infer about the reaction order and its potential biological significance?

• A. Zero order; it is independent of reactant concentration.
• B. First order; it may involve a single substrate or reactant.
• C. Third order; it involves three reactants.
• D. Second order; it involves two reactants.

Answer: (B)