Bio Enzyme Test Flashcards
what are catabolic reactions (catabolism)
A chemical reaction that results in the break-down of more complex organic molecules into simpler substances
Catabolic reactions _______ energy
release
Because catabolic reactions release energy, they are classified as _________ reactions
exothermic
Catabolic reactions are carried out by this process
hydrolysis
Anabolic reactions (anabolism) is ______
A chemical reaction that results in the building of more complex organic molecules from simpler substances
Anabolic reactions _________energy
require/consume
Anabolic reactions are carried out by this process
dehydration synthesis
Because anabolic reactions require/consume energy, they are classified as ____________ reactions
endothermic
Enzymes are known as ________
proteins/biological catalysts
what is the purpose of an enzyme?
speed up chemical reactions by lowering activation energy
Name the two hypotheses used to describe how a substrate fits into an enzyme. Which one is the more widely accepted explanation?
lock and key hypothesis and induced fit model. The induced fit model is the one most widely accepted
True or False: An enzyme is one size fits all
false an enzyme is substrate specific
Where does a noncompetitive inhibitor bind to an enzyme?
allosteric site
Compare and contrast competitive and noncompetitive inhibitors
both prevent enzyme from work. However, how they do that is different. The competitive inhibitor occupies the active site and prevents the substrate from binding.
The noncompetitive inhibitor attaches to the allosteric site, which changes the shape of the active site and the substrate can no longer bind.
How does enzyme concentration affect enzyme activity?
increases rate of the reaction because there are more active sites available
