Question detail

What is the role of enzymes in biological reactions?

Try the question, check the answer, then read the explanation to understand the curriculum point.

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Rate of reaction

Question

A. They act as inhibitors
B. They are biological catalysts that speed up reactions
C. They are reactants in the reactions
D. They are always proteins

Answer

They are biological catalysts that speed up reactions

Explanation

The correct answer is They are biological catalysts that speed up reactions. This answer directly addresses the question: What is the role of enzymes in biological reactions? It matches the approved Chemistry 8462 learning objective and the linked subtopic. The other options are incorrect because they either change the rate, catalyst, reversible reaction, equilibrium, or graph context, or they do not answer the exact point being tested.

Common mistake

Misunderstanding Reaction Profiles

Students often confuse the energy levels of reactants and products in catalysed and uncatalysed reactions on reaction profiles.

To fix this, students should practice sketching reaction profiles, clearly labeling the activation energy for both catalysed and uncatalysed pathways, and noting how the catalyst lowers the activation energy.

Related flashcards

Flashcard 1 of 5

Press Space to flip, arrows to move