Questio3n NI E — — — — — — —
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RIOCHEM M4 QUIZ
Score for this quiz: 5 out of 5
This attempt took 49 minutes.
Question 1
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Is the following molecule an aldose or ketose? Briefly explain.
CH,OH
HO H
0
HO H
S
H OH
e e
CH,0H
Your Answer:
gro up (C= 0) loc ate d with in the car bon cha in, whi le an ald ose
Ketose. A ketose molecule has a ketone
molecu le has an ald ehy de gro up (C= 0) at the end of its car bon cha in.
ketose . The re is a C= 0 on the thi rd car bon fro m the top .
Question 2
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Which carbon in erythrose would tell you if the monosaccharide is D or L? Give the carbon’s number in
your answer.
Your Answer:
Carbon-3, also called the penultimate carbon.
On carbon number 3, which is the penultimate carbon.
, #mannose are epimers. Name another epimer of glucose besides mannose.
Aver.
ACtose
Galactose.
Question 4
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Is the following structure a D or L carbohydrate? Briefly explain.
CHO
HO H
HO H
HO H
HO H
H,OH
Your Answer:
L carbohydrate.
The molecule is left handed (Levorotary) as evidenced by the location of -OH in the penultimate carbon
(carbon-5).
L. The —OH group is on the left side on the penultimate carbon. x
Question 5
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Does the compound C;H440g fit the formal definition of a carbohydrate? Explain.
Your Answer:
No, it does not. The formal definition of a carbohydrate is C,\H2,0,, or (CH,0),,.
T T S
0/0pts
RIOCHEM M4 QUIZ
Score for this quiz: 5 out of 5
This attempt took 49 minutes.
Question 1
0/0pts
Is the following molecule an aldose or ketose? Briefly explain.
CH,OH
HO H
0
HO H
S
H OH
e e
CH,0H
Your Answer:
gro up (C= 0) loc ate d with in the car bon cha in, whi le an ald ose
Ketose. A ketose molecule has a ketone
molecu le has an ald ehy de gro up (C= 0) at the end of its car bon cha in.
ketose . The re is a C= 0 on the thi rd car bon fro m the top .
Question 2
0/0 pts
Which carbon in erythrose would tell you if the monosaccharide is D or L? Give the carbon’s number in
your answer.
Your Answer:
Carbon-3, also called the penultimate carbon.
On carbon number 3, which is the penultimate carbon.
, #mannose are epimers. Name another epimer of glucose besides mannose.
Aver.
ACtose
Galactose.
Question 4
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Is the following structure a D or L carbohydrate? Briefly explain.
CHO
HO H
HO H
HO H
HO H
H,OH
Your Answer:
L carbohydrate.
The molecule is left handed (Levorotary) as evidenced by the location of -OH in the penultimate carbon
(carbon-5).
L. The —OH group is on the left side on the penultimate carbon. x
Question 5
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Does the compound C;H440g fit the formal definition of a carbohydrate? Explain.
Your Answer:
No, it does not. The formal definition of a carbohydrate is C,\H2,0,, or (CH,0),,.
T T S
