B2 enzymes Flashcards
What are enzymes?
Enzymes are biological catalysts that speed up chemical reactions in living organisms.
True or False: Enzymes are consumed in the reactions they catalyze.
False
Fill in the blank: Enzymes are made up of ______.
proteins
What is the active site of an enzyme?
The active site is the region on the enzyme where substrate molecules bind and undergo a chemical reaction.
Multiple Choice: Which factor does NOT affect enzyme activity? A) Temperature B) pH C) Color D) Substrate concentration
C) Color
What is the role of substrate in enzyme reactions?
The substrate is the reactant that an enzyme acts upon.
True or False: Each enzyme can catalyze multiple types of reactions.
False
What happens to an enzyme at high temperatures?
At high temperatures, an enzyme may denature, losing its shape and function.
Fill in the blank: The model that describes how enzymes and substrates fit together is called the ______ model.
lock and key
How does pH affect enzyme activity?
Each enzyme has an optimal pH range; deviations can lead to decreased activity or denaturation.
Multiple Choice: Which of the following is an example of an enzyme? A) Lipase B) Glucose C) RNA D) DNA
A) Lipase
What is enzyme specificity?
Enzyme specificity refers to the ability of an enzyme to choose exact substrates from a group of similar chemical molecules.
True or False: Enzymes can function in both forward and reverse reactions.
True
What are cofactors?
Cofactors are non-protein molecules that assist enzymes in catalyzing reactions.
Fill in the blank: Enzymes lower the ______ energy of a reaction.
activation
