Enzymes: Classes, kinetics and factors affecting it.   Which enzyme class catalyzes oxidation-reduction reactions? a) Transferases b) Hydrolases c) Oxidoreductases d) Ligases Answer: c) Oxidoreductases Explanation: Oxidoreductases catalyze electron transfer (e.g., dehydrogenases, oxidases). This is a fundamental classification per the IUBMB system. In Michaelis-Menten kinetics, what does Km represent? a) Maximum reaction velocity b) Substrate concentration at half Vmax c) Enzyme-substrate dissociation constant d) Turnover number Answer: b) Substrate concentration at half Vmax Explanation: Km (Michaelis constant) is the substrate concentration at which the reaction velocity is half of Vmax.…

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