This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Non competitive inhibition is 
Select and explain. 
A. Reversible, B. Irreversible, C. Any of the above, D. None of the above
C: Any of the above
Answer: C: Any of the above 
Explanation: Features of noncompetitive inhibition

Inhibitor have no structural resemblance to substrate.
Mostly Irreversible (Except a few reversible non-competitive inhibition).
Excess substrate do not abolish the inhibition.
Km remains the same.
Vmax remains the same.

Features of competitive inhibition

Inhibitor will be structural analogue of substrate.
Reversible.
Excess substrate abolishes inhibition.
Vmax remains the same.
Km increases.