What does the catalytic constant (kcat) represent in enzyme kinetics?

If the Vmax of an enzyme-catalyzed reaction is 100 μmol/min and the total enzyme concentration is 0.5 μmol, what is the kcat?

Which statement best describes the difference between kcat and Km?

Given that catalase has a kcat of 40,000,000 s⁻¹ and DNA polymerase I has a kcat of 15 s⁻¹, what can be inferred about their catalytic efficiencies?

An enzyme has a Vmax of 200 μmol/min and a total enzyme concentration of 2 μmol. What is the kcat?

If enzyme A has a kcat of 500 s⁻¹ and enzyme B has a kcat of 50 s⁻¹, what can be inferred about their catalytic efficiencies?

In a multi-step enzyme-catalyzed reaction, how does the rate-limiting step influence kcat?