BIOE1 - Version 132 Exam 1 sathasivan(48985 This print-out...

Version 132 – Exam 1 – sathasivan – (48985) 1
This print-out should have 51 questions.
Multiple-choice questions may continue on
the next column or page – find all choices
before answering.
001 10.0points
A single covalent chemical bond represents
the sharing of how many electrons?
1. Six
2. Two correct
3. Four
4. Three
5. One
Explanation:
002 10.0points
Which of the following is the correct ranking
of the biological hierarchy? select in the or-
der from highest to lowest in terms of such
hierarchy.
1. tissue, cell, organ, organelle and organ-
ism
2. organism, organ, organelle, cell and tis-
sue
3. cell, nuclear membrane, DNA, phosphate
and oxygen correct
4. cell, tissue, organ, nucleus and organelle
5. nucleus, cell, macromolecule, carbon and
tissue
Explanation:
003 10.0points
Compared with a pH of 7, a solution of
pH 5 has what times/fraction of the hydrogen
concentration?
1. twice
2.
1
100
3.
5
7
4. nearly the same concentration
5. 100 times correct
Explanation:
Recall
004 10.0points
Which of the the molecules
A)
H
2
C
O
C O
H
2
C
H
2
C
H
2
C
H
2
C
H
2
C
H
2
C
H
3
C
CH
O
C O
CH
2
CH
2
CH
2
CH
CH
CH
2
CH
2
CH
3
CH
2
O
P O O
CH
2
CH
2
N
-
(CH
3
)
3
B)
C
O OH
C H H
C H H
C H H
C H H
C H H
C H H
C H H
H
C)
O
O
O
O
O
O
O
D)
H
HO
CH
2
OH
H
H
OH
H
H
OH
O
O
H
OH
CH
2
OH
H
H
OH
H
H
OH
O

Version 132 – Exam 1 – sathasivan – (48985) 2
E)
HOCH
2
H
OH
H
H
OH
H
OH
O
F)
H
HO
CH
2
OH
H
O
H
OH
OH
H
H
OH
G)
C OH
H
H
C OH H
C H HO
C H HO
C OH H
C
H O H)
C OH
H
H
C OH H
C OH H
C H HO
C OH H
C
H O
I)
C
CH
2
H
3
N
+
H
C
O
O
CH
2
S
CH
3
J)
C C
H
3
C
H H
CH
3
K)
P OH
O
O
-
L)
C OH
H
H
C OH H
C OH H
H
M)
C C
CH
2
H
2
N
H
SH
OH
O
N)
C
C
N
HC
N
C
NH
2
N
CH
N
H
O)
N
H
H
C
H
H
C
OH
O
could be joined together by an ester linkage?
1. I and O
2. K and N
3. B and L correct
4. G and H
5. A and F
Explanation:
Comprehension and application
005 10.0points
Animals combine 1000 of the monomer
H
HO
CH
2
OH
H
H
OH
OH
H
H
OH
O
and store them as
1. starch.
2. protein.
3. glycogen. correct
4. DNA.
5. steroid.
Explanation:
First you need to identify the monomer as
a simple sugar and then figure out that a
polymer of 1000 such monomers will make
a polysaccharide. Then recall the storage
polysaccharide in animal glycogen. Only
plants make starch as storage polysaccharide.
006 10.0points
You have eaten a potato chip that contained
starch made of 10,000 glucose monomers com-
bined together.
After complete digestion through hydroly-
sis, this will yield
I) 10,000 glucose molecules.
II) 10,000 water molecules.
III) 9,999 water molecules.
IV) 9,999 glucose molecules.
1. III and IV only
2. I and II only

Version 132 – Exam 1 – sathasivan – (48985) 3
3. I and III only
4. I only correct
5. II only
Explanation:
Hydrolysis is the breakdown of a larger
molecule to simpler molecule. It uses wa-
ter and does not form any water molecules.
Hence a complete digestion of a polymer
with 10,000 monomers will yield only 10,000
monomers. To go into further details, it will
utilize 9999 water molecules to break down
this larger polymer.