Q1) The digestion and absorption of starch involves hydrolysis
to glucose
A. followed by an antiport mechanism of absorption.
B. followed by phosphorylation and absorption of the
glucose phosphate.
C. followed by absorption after conjugation with
glutathione.
D. followed by absorption via a symport mechanism.
E. after endocytosis of starch by intestinal epithelial
cells.
Q2) Pancreatic enzymes cannot catalyze the complete digestion of
dietary proteins to amino acids in the intestine because
A. pancreatic proteases are zymogens.
B. the pH in the small intestine is unfavorable for
activity of pancreatic proteases.
C. pancreatic proteases are endopeptidases.
D. bacteria destroy pancreatic proteases in the small
intestine.
E. pepsin from the stomach is required to activate
pancreatic proteases.
Q3) Absorption of all the major nutrients (fat, protein,
polysaccharide) from the gut has which of the following
characteristics?
A. Active transport is required.
B. ATP hydrolysis, when employed, results in heat
production, not useful work.
C. The products absorbed are typically derived by
hydrolysis of larger molecules.
D. Absorption results exclusively in entry into the portal
circulation.
E. In each case where ATP is employed, the absorbed
substance is phosphorylated.