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Five- and six-membered ring carbohydrate hemiacetals and hemiketals are reasonably stable and can be easily isolated in contrast to a typical organic acetal. Account for this difference in stability.

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Carbohydrate acetals have an O...

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Which of the following is an alditol?


A)
Which of the following is an alditol? A) B) C) D) E)
B)
Which of the following is an alditol? A) B) C) D) E)
C)
Which of the following is an alditol? A) B) C) D) E)
D)
Which of the following is an alditol? A) B) C) D) E)
E)
Which of the following is an alditol? A) B) C) D) E)

F) C) and E)
G) C) and D)

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Classify D-glyceraldehyde and dihydroxyacetone as enantiomers, diastereomers, epimers or an aldose-ketose pair.

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Glyceraldehyde and d...

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The most abundant organic substance on earth is __________.


A) starch
B) cellulose
C) sucrose
D) glucose
E) Both B and D are correct.

F) A) and E)
G) A) and D)

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The principle means of protection of plants against herbivores is __________.


A) taste
B) smell
C) poison
D) mimicry
E) color

F) A) and E)
G) A) and D)

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Treatment of fructose with methyl iodide produces 1,3,4,6,-tetra-O-methylfructose What does this information tell you about the ring structure of fructose?

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The information provided revea...

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Which of the following is an example of posttranslational modification of proteins?


A) Phosphorylation
B) Acetylation
C) Proteolytic cleavage
D) Glycosylation
E) All of the above are examples of posttranslational modification.

F) B) and C)
G) B) and D)

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The glycome is the __________.


A) total set of sugars and glycans that an organism produces
B) total set of sugars that an organism produces
C) total set of glycans that an organism produces
D) glycoforms produced by a single sugar
E) None of the above are correct.

F) B) and C)
G) D) and E)

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In glycoproteins carbohydrate is most often linked to threonine, asparagine or __________.


A) serine
B) lysine
C) valine
D) aspartic acid
E) tyrosine

F) C) and E)
G) D) and E)

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Which of the following yields N-acetyl-D-glucosamine on hydrolysis?


A) Cellulose
B) Heparin
C) Chitin
D) Amylopectin
E) Amylose

F) All of the above
G) A) and C)

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Savory taste detects which of the following?


A) Sugars
B) Amino acids
C) Toxicity
D) Electrolytes
E) Acids

F) A) and E)
G) B) and E)

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Sucrose does not undergo mutarotation. Explain.

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In order for the sugar to unde...

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How does glycation of red blood cells serve as a measure of long term blood glucose levels?

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The amino groups of hemoglobin within re...

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A glycosidic link is chemically an __________.


A) ether
B) ester
C) amide
D) aldehyde
E) ketone

F) A) and B)
G) A) and C)

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What is the smallest ketose that can form a stable ring?

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Stable ketose rings contain five or grea...

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