Enzymes
Flashcard
•
Science
•
10th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is an enzyme?
Back
A biological catalyst that speeds up chemical reactions in living organisms by lowering the activation energy.
2.
FLASHCARD QUESTION
Front
What is the optimum pH for an enzyme?
Back
The pH at which an enzyme's activity is at its maximum.
3.
FLASHCARD QUESTION
Front
How do enzymes speed up reactions?
Back
By lowering the activation energy required for the reaction to occur.
4.
FLASHCARD QUESTION
Front
What is a competitive inhibitor?
Back
A substance that slows down enzyme activity by binding to the active site, preventing the substrate from binding.
5.
FLASHCARD QUESTION
Front
What is the lock-and-key model of enzyme action?
Back
A model that describes how the substrate fits precisely into the active site of the enzyme, similar to a key fitting into a lock.
6.
FLASHCARD QUESTION
Front
What is the active site of an enzyme?
Back
The specific region of the enzyme where the substrate binds and the reaction occurs.
7.
FLASHCARD QUESTION
Front
What happens to enzyme activity at extreme pH levels?
Back
Enzyme activity typically decreases as extreme pH levels can denature the enzyme, altering its structure.
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