Enzyme action Flashcards
What is an enzyme?
A biological catalyst that accelerates chemical reactions in living organisms.
True or False: Enzymes are consumed in the reactions they catalyze.
False
What is the active site of an enzyme?
The specific region where substrate molecules bind and undergo a chemical reaction.
Fill in the blank: Enzymes are typically __________, which means they speed up reactions without being permanently altered.
catalysts
What factors can affect enzyme activity?
Temperature, pH, substrate concentration, and enzyme concentration.
Multiple Choice: What is the role of coenzymes in enzyme action?
A) They are substrates
B) They enhance enzyme function
C) They are inhibitors
D) They are waste products
B) They enhance enzyme function
What is substrate specificity?
The ability of an enzyme to selectively bind to a specific substrate.
True or False: Enzymes can catalyze multiple different reactions.
False
Fill in the blank: The model that describes enzyme-substrate interaction is called the __________ model.
lock and key
What is enzyme denaturation?
The process in which an enzyme loses its functional shape, typically due to extreme temperatures or pH levels.
Multiple Choice: Which of the following is NOT a type of enzyme inhibitor?
A) Competitive
B) Non-competitive
C) Irreversible
D) Reversible
D) Reversible
What is the effect of temperature on enzyme activity?
Enzyme activity increases with temperature up to an optimal point, after which it decreases due to denaturation.
True or False: All enzymes are proteins.
False
What is an allosteric site?
A site on an enzyme where molecules can bind and influence enzyme activity, separate from the active site.
Fill in the blank: Enzymes that catalyze the addition of phosphate groups are called __________.
kinases
