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Questions and Answers
Which of the following statements is true regarding enzymes and catalysts?
Which of the following statements is true regarding enzymes and catalysts?
- Enzymes do not undergo any change in their composition while catalysts can be easily inactivated
- Enzymes catalyse only biological reactions while catalysts have a wide range (correct)
- Both enzymes and catalysts are complex proteins
- Enzymes are simple inorganic molecules while catalysts are complex proteins
What is the main difference between enzymes and catalysts?
What is the main difference between enzymes and catalysts?
- Enzymes catalyse specific types of reactions while catalysts have a wide range (correct)
- Enzymes can be used again and again while catalysts cannot
- Enzymes and catalysts are the same thing
- Enzymes are not affected by temperature and pH while catalysts are significantly affected
Which of the following is a similarity between enzymes and catalysts?
Which of the following is a similarity between enzymes and catalysts?
- Both enzymes and catalysts do not alter the nature and quantity of the end products (correct)
- Enzymes are significantly affected by temperature and pH while catalysts are not
- Enzymes catalyse only biological reactions while catalysts have a wide range
- Both enzymes and catalysts can initiate a reaction
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Study Notes
Similarities:
- Both are needed in minute quantities
- Both accelerate the rate of a reaction, but cannot initiate one
- Both of them bring about a decrease in the activation energy
- Both of them temporarily combine with the substrate molecule
- Both of them do not undergo any change in their composition and hence, can be used again and again
- Both of them do not alter the nature and quantity of the end products
- The reaction accelerated by both of them is reversible
Differences:
- Enzymes are complex proteins while catalysts are simple inorganic molecules
- Enzymes have a very high molecular weight while catalysts have a low molecular weight
- Enzymes catalyse only biological reactions
- Enzymes catalyse specific types of reactions while catalysts have a wide range
- Enzymes are significantly affected by temperature and pH, but not so in the case of catalysts
- Enzymes are regulated by specific substances called cofactors, but not so in the case of catalysts
- Enzymes can be easily inactivated but not so in the case of catalysts
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