ANSWERS SURE A+
✔✔What is the basic source of energy for all cells in the human body?
a. galactose
b. cellulose
c. amino acids
d. glucose - ✔✔d. glucose
✔✔Which of the following properties best describes pentoses?
a. pentoses provide a significant amount of energy
b. pentoses are key constituents of NADP+
c. pentoses are used for synthesis of hexoses
d. pentoses are prevalent in diet
e. pentoses are aldoses - ✔✔b. pentoses are key constituents of NADP+
✔✔All of the following compounds are reducing sugars except
a. glucose
b. sucrose
c. lactose
d. fructose
e. galactose - ✔✔b. sucrose
✔✔Which of the following pairs are the major dietary carbohydrates?
a. pentoses and hexoses
b. mono- and di-saccharides
c. disaccharides and starches
d. oligo- and di-saccharides
e. poly- and oligo-saccharides - ✔✔c. disaccharides and starches
✔✔When pancreatic amylase acts on amylopectin, the products are:
a. maltose and isomaltose
b. amylose and glucose
c. glucose and maltose
d. lactose and amylose
e. limit dextrin and glucose - ✔✔a. maltose and isomaltose (there are no
monosaccharides yet)
✔✔Which glucose transport (GLUT) is responsible for reducing blood glucose levels by
insulin?
a. GLUT 1
b. GLUT 2
c. GLUT 3
d. GLUT 4
, e. GLUT 5 - ✔✔d. GLUT 4
✔✔Aerobic glucose metabolism may occur in:
a. brain
b. liver
c. red muscle
d. heart
e. all of these - ✔✔e. all of these
✔✔Either glucokinase in liver or hexokinase in muscle cells is a key enzyme that
controls glycogenesis pathway.
a. true
b. false - ✔✔a. true
✔✔Which of the following pairs of enzymes is allosterically regulated in skeletal
muscle?
a. Phosphofructokinase and glucokinase
b. Hexokinase and glucose 6-phosphatase
c. Phosphoglycerate kinase and phosphofructokinase
d. Lactate dehydrogenase and pyruvate dehydrogenase
e. Hexokinase and phosphofructokinase. - ✔✔e. hexokinase and phosphofructokinase
✔✔How many mols of ATP (or equivalent high-energy phosphate bonds) can be formed
by the oxidation of one glucose unit (-1, 4 linked) in glycogen to lactic acid?
a. 2
b. 3
c. 8
d. 24
e. 38 - ✔✔b. 3
✔✔To prevent accumulation of ketone bodies, a tissue cell must have a functioning:
a. Gluconeogenesis pathway
b. Glycolysis pathway
c. Krebs cycle
d. Malate-aspartate shuttle system
e. Pyruvate dehydrogenase - ✔✔c. Krebs cycle
✔✔The major precursors for gluconeogenesis are lactate, glycerol and certain amino
acids.
a. true
b. false - ✔✔a. true
✔✔Which of the following statements about pyruvate is most accurate?
a. Pyruvate can be produced only from carbohydrates