E) both
monosaccharides
and
disaccharides.
Answer: D
53) Which
of
the
following
is
NOT
an
enzyme
that
acts
on
the
products
of
amylase
digestion
of
glycogen
and
starch?
A) galactase
B) maltase
C) sucrase
D) dextrinase
E) glucoamylase
Answer: A
54) The
absorption
of
glucose
involves
________
across
the
apical
membrane
and
________
across
the
basolateral
membrane.
A) secondary
active
transport
:
secondary
active
transport
B) facilitated
diffusion
:
facilitated
diffusion
C) secondary
active
transport
:
primary
active
transport
D) secondary
active
transport
:
facilitated
diffusion
E) simple
diffusion
:
facilitated
diffusion
Answer: D
55) Where
are
enzymes
that
breakdown
disaccharides
located?
A) in
the
lumen
of
the
large
intestine
B) on
the
basolateral
membrane
of
enterocytes
C) inside
enterocytes
D) in
the
lumen
of
the
small
intestine
E) on
the
apical
membrane
of
enterocytes
Answer: E
56) The
absorption
of
fructose
across
the
apical
membrane
of
the
lumenal
epithelial
cells
occurs
through
what
process?
A) sodium
-
linked
secondary
active
transport
B) primary
active
transport
C) paracellular
transport
D) facilitated
diffusion
E) diffusion
Answer: D
9
57) The
digestion
of
proteins
begins
in
the
________
with
the
activation
of
the
zymogen
________.
A) small
intestine
:
trypsinogen
B) stomach
:
procarboxypeptidase
C) stomach
:
pepsinogen
D) small
intestine
:
chymotrypsinogen
E) mouth
:
pepsinogen
Answer: C
58) What
enzyme
is
responsible
for
cleavage
of
the
amino
acid
at
the
amine
portion
of
the
peptide
fragment?
A) carboxypeptidase
B) aminopeptidase
C) chymotrypsin
D) trypsin
E) enterokinase
Answer: B
59) What
enzyme
activates
procarboxypeptidase?
A) carboxypeptidase
B) trypsin
C) enterokinase
D) pepsin
E) aminopeptidase
Answer: B
60) Proteolytic
enzymes
secreted
in
pancreatic
juice
are
stored
in
secretory
cells
of
the
pancreas
as
A) zymogens.
B) pepsinogen.
C) limit
dextrins.
D) chylomicrons.
E) bile
salts.
Answer: A
61) What
enzyme
cleaves
trypsinogen
to
trypsin?
A) amylase
B) enterokinase
C) pepsin
D) procarboxypeptidase
E) chymotrypsin
Answer: B
62) Many
individual
amino
acids
enter
the
epithelial
cells
that
line
the
lumen
of
the
digestive
tract
via
what
transport
process?
A) primary
active
transport
B) simple
diffusion
C) paracellular
transport
D) sodium
-
linked
secondary
active
transport
E) facilitated
diffusion
Answer: D
10
63) In
order
to
begin
the
process
of
fat
digestion,
the
fat
globules
must
be
A) emulsified
by
trypsin.
B) coalesced
by
bile
salts.
C) emulsified
by
bile
salts.
D) emulsified
by
lipases.
E) coalesced
by
lipase.
Answer: C
64) Emulsification
aids
in
the
digestion
of
fats
by
A) beginning
the
process
of
degrading
the
triglycerides
within
the
fat
globule.
B) increasing
the
surface
area
of
the
fat
globule
exposed
to
enzymes.
C) the
ability
of
bile
salts
to
activate
lipases
that
digest
fats.
D) increasing
the
number
of
hydrophobic
residues
on
the
surface
of
the
fat
globule.
