2.5 Enzymes Flashcards
1
Q
define an enzyme
A
globular protein catalysts
2
Q
what do enzymes do
A
increase the rate of chemical reactions and involve molecular motion
3
Q
where does the substrate bond
A
active site
4
Q
activation energy
A
the energy required for the reaction to occur
5
Q
relationship temperature to enzyme activity
A
- increase in molecular collisions
- enzyme loses shape: slows down
- increase in temperature: rapid decline
6
Q
relationship pH to enzyme activity
A
acidic: some have an optimum pH
neutral: most enzymes have optimum near 7
7
Q
relationship substrate concentration to enzyme activity
A
- more collisions, increase
- every molecule is working as fast as possible: level off
8
Q
why immobilized enzymes are used
A
- prevent contamination
- stabilizes changes in temp and pH
9
Q
shape of enzymes
A
specific, complex
