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1. 
what is an enzyme?
A.
bacteria
B.
biological catalyst
C.
a lipid
D.
none of the above
2. 
denatured results in
A.
the death of an enzyme
B.
the birth of an enzyme
C.
the altering of an enzymes shape
D.
none of the above
3. 
which of the following influences enzyme activity?
A.
temperature
B.
pH
C.
smoke
D.
none of the above
4. 
lipase is a type of enzyme which reacts with...
A.
protein
B.
water
C.
fats
D.
Justin Beiber
5. 
pepsin works best at a pH
A.
10
B.
7
C.
5
D.
2