1) Sucrose is hydrolyzed to what two monosaccharides?
A) glucose and fructose
B) glucose and galactose
C) maltose and fructose
D) galactose and lactose
E) galactose and maltose
A) glucose and fructose
6) In the Fischer projection of D-(+)-glyceraldehyde, the hydroxyl group on the asymmetric carbon center is:
A) on the bottom
B) on the top
C) at the left
D) at the right
E) present as a hemiacetal
D) at the right
16) Fructose forms:
A) a five-membered cyclic hemiacetal.
B) a six-membered cyclic hemiacetal.
C) a six-membered lactone.
D) a five-membered lactone.
E) none of the above
A) a five-membered cyclic hemiacetal.
24) Cellulose and amylose are:
A) 1,4' linked polymers of D-glucose which differ in the stereochemistry of this linkage.
B) 1,6' linked polymers of D-glucose which differ in the stereochemistry of this linkage.
C) polymers of D-glucose which are structura
A) 1,4' linked polymers of D-glucose which differ in the stereochemistry of this linkage.
31) What are the two most common unwanted side reactions which can occur when monosaccharides are treated with base?
A) epimerization and enediol rearrangement
B) mutarotation and epimerization
C) enediol rearrangement and glycoside formation
D) Kiliani-F
A) epimerization and enediol rearrangement
36) Which of the following would give a positive Tollen's test?
A) ?-D-glucopyranose
B) methyl ?-D-glucopyranoside
C) sucrose
D) methyl ?-D-ribofuranoside
E) none of the above
A) ?-D-glucopyranose
37) Which of the following is a reducing sugar?
A) ?-D-fructofuranose
B) the methyl glycoside of cellobiose
C) ethyl ?-D-glucopyranoside
D) methyl ?-D-fructofuranoside
E) none of the above
A) ?-D-fructofuranose
41) Treatment of a monosaccharide with silver oxide and excess methyl iodide will:
A) methylate all hydroxyl groups present.
B) cleave the sugar between C5 and C6.
C) cleave the sugar between C1 and C6.
D) methylate only the hydroxyl at C1.
E) form the di
A) methylate all hydroxyl groups present.
61) How many molecules of carbon dioxide and water are needed to make a molecule of glucose in photosynthesis?
A) 5 CO2 and 5 H20
B) 5 CO2 and 6 H20
C) 6 CO2 and 6 H20
D) 6 CO2 and 2 H20
E) 2 CO2 and 2 H20
C) 6 CO2 and 6 H20
92) Which of the following statements is true?
A) All monosaccharides in either the ketose of aldose family are reducing sugars.
B) Only aldoses, but not ketoses, are reducing sugars.
C) Only ketoses, but not aldoses, are reducing sugars.
D) All disacchar
A) All monosaccharides in either the ketose of aldose family are reducing sugars.
94) Which of the following descriptions of the nucleoside uridine does not apply to the structure of the molecule?
A) The uracil base is directly bonded to the 1' position of ribofuranose in the ? position
B) The ribofuranose moiety is found in only the D
A) The uracil base is directly bonded to the 1' position of ribofuranose in the ? position