Enzymes Flashcards
____speed up chemical reactions by lowering the activation energy needed for reactants to come together and react.
Enzymes
The human enzyme that helps digest proteins in the stomach is named _____.
pepsin
Proteins that speed up biochemical reactions are known as _____.
enzymes
___act as biological catalysts allowing reactions to occur at the rate necessary for life.
enzymes
Enzymes are biological ____
catalysts
How many reactions can enzymes catalyze?
Several million reactions per second
If a reaction takes several days to occur without an enzyme, how quickly can it occur with an enzyme?
less than a second
About how many biochemical reactions do enzymes catalyze?
4,000
Which of the following do enzymes help living organisms achieve?
Increasing the rate of a biochemical reaction
The attribute(s) of an enzyme is/are that they:
all of the above
Which of the following are examples of ways enzymes speed up biochemical reactions?
A and B
Are enzymes reactants?
No
True or False:
Enzymes slow down chemical reactions.
false
Enzymes do not help in the digestion of food.
false
Enzymes are used up in chemical reactions.
false
Enzymes are different from catalysts in that they:
are proteins
Enzymes may be used more than once.
true
Enzymes are proteins that catalyze biochemical reactions.
true
Enzymes are biological catalysts. They speed up biochemical reactions.
true
Enzymes can catalyze several reactions per second.
false
