31) In the figure above, the monosaccharide unit on the right is a(n)
A) aldopentose.
B) ketopentose.
C) aldohexose.
D) aldoheptose.
E) ketohexose.
32) Hydrolysis of the disaccharide above gives the monosaccharides
A) fructose and ribose.
B) fructose and galactose.
C) ribose and glucose.
D) ribose and galactose.
E) fructose and lactose.
33) The disaccharide above contains a(n) __________-glycosidic linkage.
A) α-1,4
B) β-1,4
C) α-2,4
D) β-2,4
E) α-2,6
34) Maltose is a
A) monosaccharide.
B) disaccharide.
C) trisaccharide.
D) polysaccharide.
E) phosphosaccharide.
35) Galactose is a product of enzymatic hydrolysis of
A) lactose.
B) glucose.
C) maltose.
D) erythrose.
E) sucrose.
36) Maltose can be classified as a(n)
A) disaccharide.
B) polysaccharide.
C) ketose.
D) pentose.
E) oligosaccharide.
37) Which of the following contains α-1,6-branches?
A) amylose
B) glycogen
C) cellulose
D) sucrose
E) maltose
38) Cellulose is not digestible by humans because it contains glucose units linked by __________-glycosidic bonds.
A) α-1,2
B) α-1,4
C) α-1,6
D) β-1,2
E) β-1,4
39) Amylose is a form of starch which has
A) only β-1,4-bonds between glucose units.
B) only α-1,4-links bonds glucose units.
C) both α-1,4-and β-1,4-bonds between glucose units.
D) hemiacetal links joining glucose units.
E) carbon-carbon bonds joining glucose units.
40) Humans cannot digest cellulose because they
A) lack the necessary enzymes to digest β-glycosides.
B) are allergic to β-glycosides.
C) are poisoned by β-glycosides.
D) have intestinal flora which use up β-glycosides.
E) cannot digest chlorophyll.
41) Under acid hydrolysis conditions, starch is converted to
A) glucose.
B) xylose.
C) maltose.
D) galactose.
E) fructose.