Name ________________________
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Period
kE'1
Date _________________
Regents Biology
ENZYME REVIEW
1. An enzyme and four different molecules are shown in the diagram below.
Enzyme
Molecules:
o
0
(A)
( D)
(C)
(B)
The enzyme would most likely affect reactions involving
(1) molecule A, only
@nolecule C, only
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(3) molecules Band D
(4) molecules A and C
2. Base your answers to questions 2 through 4 on the diagram below that represents a human
enzyme and four types of molecules present in a solution in a flask .
Enzyme
Molecules
o
A
B
Which molecule would most likely react with the enzyme?
C
D
D
3. Explain your answer to question 2. What principle about how enzymes work does Ihe question
il IUSI~e? J'S -ti.~ CY\1'f Sll\hs.~~Ie.... 1'4-1' WI'I/ -t1'T
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Name ________________
Regents Biology
4. Match the enzymes with their substrates and functions .
.-l A. amylase
1. synthesizes DNA
~ B. protease
2. digests sugar in beer (maltose)
l
3. digests starch (amylose)
C.lactase
__1_ D. DNA polymerase
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4. synthesizes A TP
~ E. maltase
~ F. A TP synthase
5. digests milk sugar (lactose)
6. digests proteins
5. Base your answers to the following questions on the graph below and on your knowledge of
biology .
Pepsin
(digests
protein in
stomach)
-0 c0
.I!!'lO
t;
~
.
Tl)'PSin
(digests
profeln in
Intestine)
CD CD
~a: ~
CD
o
1 2
3 4
5 6
7 8 9 10 11 12 13 14
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pH
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6. What is the optimal pH for pepSin? _ _-="+f,f/P.:..frJi.
..::....:_·_ /"o'..J.H
--1-...;11...3L-_________
j
~-'S"'-_..:fA~c:.;.:. d.: "-\''.-- .c...
: =.______
7. Is this pH acid or basic? _ _ _-4-0...:....:..-'"
;-+ . 3
" '-_.L.1
I
8. In what organ of the digestive system does pepsin work?
9. What is the optimal pH for trypsin?
O:ffY''D x· pt\
10. ln what organ of the digestive system does trypsin work?
11. Is this pH acid or basic?
pr+ x:
I~S
J('> n~
C(
If\t(stD ~
W \\c...
12. Neither enzyme works at a pHs of --'0
.L.7J...J4"----'I:o:::..--r_LI..!:2-.
=-_________
~ )
}IIOt ..... e.. 1\
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