Multiple Choice
Which class of biological macromolecule do most enzymes belong to?
33
views
6. Enzymes and Enzyme Kinetics
Enzymes
Multiple Choice
During an enzymatic reaction, what happens to the enzyme after converting substrate to product?
A
It binds substrate covalently and remains irreversibly inactivated after one turnover.
B
It is regenerated unchanged and can catalyze additional reactions.
C
It is converted into product along with the substrate.
D
It is permanently consumed and must be resynthesized after each reaction.
Verified step by step guidance1
Understand the role of an enzyme in a biochemical reaction: enzymes act as catalysts that speed up the conversion of substrate into product without being consumed in the process.
Recall the fundamental property of enzymes that distinguishes them from reactants: enzymes are not permanently altered or used up during the reaction; instead, they facilitate the reaction and are regenerated at the end.
Analyze the options given: if the enzyme were covalently bound and irreversibly inactivated, or converted into product, or permanently consumed, it would not be able to catalyze multiple reactions, which contradicts the catalytic nature of enzymes.
Recognize that the correct understanding is that the enzyme remains unchanged after the reaction and is free to catalyze additional substrate molecules, maintaining its structure and function.
Summarize that enzymes function by lowering activation energy and are regenerated unchanged after each catalytic cycle, allowing continuous catalysis without the need for resynthesis after every reaction.
Related Videos
Related Practice
