Biochemistry - MCQ Practice Questions
Biochemistry sits at the point where chemistry stops being abstract and starts describing living systems. Practice covers carbohydrates, proteins and amino acids, lipids, nucleic acids, enzymes and enzyme kinetics, metabolic pathways, and vitamins and coenzymes. Pathway questions include the regulation step in the explanation, because that is usually what the question is really testing rather than the sequence itself.
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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?