Biology · Enzymes
Work through this past-paper style MCQ, then read the full explanation. Practice more biology questions on mMCQ with adaptive practice and topic analytics.
All of the following are characteristics of enzymes except:
- A
They increase the activation energy
- B
They are specific in action
- C
They possess specific active site
- D
They possess dimensional shapes
They increase the activation energy: This statement is incorrect. Enzymes actually decrease the activation energy required for a chemical reaction to occur, making the reaction more favorable and speeding up the rate of the reaction.
Therefore, the incorrect statement among the options is "They increase the activation energy." Enzymes actually lower the activation energy of reactions, allowing them to occur more readily.
They increase the activation energy: This statement is incorrect. Enzymes actually decrease the activation energy required for a chemical reaction to occur, making the reaction more favorable and speeding up the rate of the reaction.
They are specific in action: This statement is correct. Enzymes are highly specific in their action and typically catalyze specific reactions or types of reactions.
They possess specific active sites: This statement is correct. Enzymes have specific regions called active sites where substrates bind and undergo the catalytic reaction.
They possess dimensional shapes: This statement is incorrect. Enzymes do possess specific three-dimensional shapes, often referred to as their tertiary structure, which is crucial for their function and interaction with substrates.
Tagged under Biology · Enzymes · 2009