Refer to the monosaccharides above to answer questions 2-6. 2. Xylulose is class
ID: 550328 • Letter: R
Question
Refer to the monosaccharides above to answer questions 2-6.
2. Xylulose is classified as a(n) ______________________.
A. ketohexose
B. aldopentose
C. ketopentose
D. aldotetrose
3. Ribose is classified as a(n) ______________________.
A. ketohexose
B. aldopentose
C. ketopentose
D. aldotetrose
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4.Xylulose and Ribose are ________________________
A. stereoisomers: enantiomers
B. constitutional isomers
C. stereoisomers: not enantiomers
D. not isomers
5.Ribose and Psicose are ________________________.
A. stereoisomers: enantiomers
B. constitutional isomers
C. stereoisomers: not enantiomers
D. not isomers
6.A chiral carbon is a "chirality center." How many chirality centers does psicose have?
A. 2
B. 3
C. 4
D. 5
A. ketohexose
B. aldopentose
C. ketopentose
D. aldotetrose
Information CH,0H 2 CH2OH CHO HO CHO HO OH OH CH,OH Ribose Ho OH CH2OH Xylulose HO CH,OH CH2OH Threose PsicoseExplanation / Answer
2) Xylulose contain 5 C with ketone functional group. so it is keto hexose
answer = option C = Keto pentose
3) ribose contain aldehyde functional group with 5C atoms
so it is aldopentose
answer = option b = aldopentose
4) answer = option D = notisomers
both are contain different molecular formula so they are not isomers.
5) answer = option B = 3
it contain 3 chiral centers
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