Which of the followings is correct about enzyme catalysts?
Correct answer: D. All of these
- A. These are in pure crystalline state
- B. The activity of enzyme catalyst is inhibited by poison
- C. Enzyme catalytic reactions have maximum rate at optimum temperature
- D. All of these
Explanation
The correct answer is D: All of these. Enzyme catalysts can exist in a pure crystalline state, although this is not a feature of all enzymes. They can be inhibited by specific substances, which are often called poisons, affecting their catalytic action. Additionally, enzyme catalytic reactions typically have an optimum temperature where the reaction rate is maximized. Each of these characteristics is a valid attribute of enzymes, making option D the comprehensive and correct choice. Options A, B, and C individually represent true but partial aspects of enzyme behavior.
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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