Biochemistry - MCQ Practice Questions

Which enzyme belongs to the transferase class (EC 2)?

A patient has elevated serum creatine kinase (CK). Which tissue type is primarily affected?

Which prosthetic group is found in cytochrome c oxidase?

In a temperature vs. enzyme activity graph, why does enzyme activity decrease above the optimal temperature?

Which proteolytic enzyme is responsible for activating trypsinogen to trypsin in the small intestine?

A researcher studying protein folding observes that a newly synthesized polypeptide chain contains multiple disulfide bonds between cysteine residues. Which cellular compartment is most likely responsible for facilitating the formation of these disulfide bonds?

An enzyme exhibits a Km of 2 mM and Vmax of 100 μmol/min. When substrate concentration is 6 mM and an allosteric inhibitor is added, the Vmax decreases to 50 μmol/min while Km remains unchanged. What type of inhibition is occurring?