This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins and Minerals, Subject name: Biochemistry
True about competitive inhibition with first order kinetics 
Select and explain. 
A. Km increased, Vmax same, B. Vmax increased, Km same, C. Km same, Vmax decrease, D. Km same, Vmax increase
A: Km increased, Vmax same
Answer: A: Km increased, Vmax same 
Explanation: Ans. (a) Km increased, Vmax sameType of InhibitionKmVmaxCompetitive inhibitionINCREASEDSAMENon-competitive inhibitionSameDECREASEDCompetitive Inhibtion: Substrate and inhibitor, both compete for same site on enzyme.Non-competitive Inhibition: Substrate and inhibitor both bind at different sites in the enzyme.