Multiple Choice
Which of the following most directly controls the rate at which food is broken down to release energy in cells?
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7. Energy and Metabolism
Enzymes
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following is a characteristic of enzymes?
A
They are consumed during the reaction and cannot be reused.
B
They function equally well at all temperatures and pH levels.
C
They increase the activation energy required for a reaction.
D
They act as biological catalysts to speed up chemical reactions.
Verified step by step guidance1
Understand the role of enzymes in biological systems: Enzymes are proteins that act as biological catalysts, meaning they speed up chemical reactions without being consumed in the process.
Clarify the concept of activation energy: Enzymes lower the activation energy required for a reaction, making it easier for the reaction to occur.
Examine the specificity of enzymes: Enzymes are highly specific to their substrates and work optimally within certain temperature and pH ranges. They do not function equally well at all temperatures and pH levels.
Address the misconception about enzyme consumption: Enzymes are not consumed during the reaction; they remain unchanged and can be reused for multiple reactions.
Conclude with the correct characteristic: The defining feature of enzymes is that they act as biological catalysts to speed up chemical reactions, which is the correct answer to the problem.
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