BIOCHEMISTRY Study Guides compiled (2016-2020)
1. 1. Which statement about digestion is FALSE?
a. Celiac disease is caused by the inability of the stomach to completely degrade carbohydrates to glucose.
b. Digestive enzymes are produced as zymogens and are activated only in the intestine.
c. The acidic environment in the stomach causes the denaturation of proteins via disruption of ionic and
hydrogen bonds.
d. The final step in the digestion of lipids is the packing of triacylglycerols into lipoprotein particles called
chylomicrons.
e. During digestion, the release of secretin from the intestine stimulates the release of NaHCO3 from the
pancreas to neutralize stomach acid.: a
2. 2. Enzymes that digest the triacylglycerols into 2 free fatty acids and
monoa- cylglycerol are called
a. hydrolyases.
b. peptidases.
c. reductases.
d. lipases.
e. glycolyases.: d
3. 3. Caloric homeostasis or the ability to maintain adequate energy stores is regulated by different hormones.
What is the function of glucagon-like peptide (GLP-1) in this process? GLP-1
a. is produced and released by the pancreas and reports on the availability of proteins.
, BIOCHEMISTRY Study Guides compiled (2016-2020)
b. serves as a short-term signal and stimulates satiety.
c. serves as a long-term signal and stimulates appetite in response to hunger.
d. deficiency causes obesity due to overeating.
e. plays an important role as a long-term signal and controls the release of stomach acid.: b
4. 4. Which of the following pathways functions as both catabolic and anabolic depending on the needs of the
cell?
a. glycolysis
b. gluconeogenesis
c. citric acid cycle
d. electron transport chain
e. glycogen synthesis: c
5. 5. Which statement about metabolic concepts is CORRECT?
a. GDP is the universal currency of free energy.
b. Catabolic pathways use ATP and reducing power to synthesize large mole- cules.
, BIOCHEMISTRY Study Guides compiled (2016-2020)
c. Fats are a more energy efficient food source than glucose, because the carbons in fats are more reduced.
d. A reaction occurs spontaneously only if ”G (change in free energy) is positive.
e. Coenzyme A is an activated carrier of phosphoryl groups and the transfer of phosphoryl groups onto lipids
generates NADPH.: c
6. 6. Which statement about
FAD is FALSE? FAD
a. is a carrier of electrons for fuel oxidation.
b. has an isoalloxazine ring as the reactive part.
c. is derived from the vitamin riboflavin, which is a B-vitamin.
d. is the electron donor for biosynthetic pathways.
e. stands for flavin adenine dinucleotide: d
7. 7. Which statement about the function of the glycolytic enzyme enolase is
FALSE? Enolase
a. generates ATP by substrate-level phosphorylation.
b. catalyzes a reversible reaction.
c. is inhibited by fluoride that is present in toothpaste and drinking water.
d. catalyzes a dehydration reaction by removing a molecule of water.
e. produces phosphoenolpyruvate.: a
8. 8. In
, BIOCHEMISTRY Study Guides compiled (2016-2020)
glycolysis, phosphoglycerate kinase converts to
.
a. glycerol; glyceraldehyde 3-phosphate
b. 3-phosphoglycerate; 2-phosphoglycerate
c. 1,3-bisphosphoglycerate; 3-phosphoglycerate
d. glyceraldehyde 3-phosphate; 1,3-bisphosphoglycerate
e. fructose 6-phosphate; glycerate 1,6-bisphosphate: c
9. 9. The two ATP-producing reactions of glycolysis are catalyzed by the enzymes
a. fructokinase and aldolase.
b. glyceraldehyde 3-phosphate dehydrogenase and protein kinase A.
c. phosphoglycerate kinase and pyruvate kinase.
d. hexokinase and phosphofructokinase.
e. phosphoglucose isomerase and triosephosphate isomerase.: c
10. 10. When oxygen is limiting
(anaerobic conditions) during intense exer- cise, the skeletal muscle converts pyruvate into
a. ethanol.
b. glucose.
c. glycerol.
1. 1. Which statement about digestion is FALSE?
a. Celiac disease is caused by the inability of the stomach to completely degrade carbohydrates to glucose.
b. Digestive enzymes are produced as zymogens and are activated only in the intestine.
c. The acidic environment in the stomach causes the denaturation of proteins via disruption of ionic and
hydrogen bonds.
d. The final step in the digestion of lipids is the packing of triacylglycerols into lipoprotein particles called
chylomicrons.
e. During digestion, the release of secretin from the intestine stimulates the release of NaHCO3 from the
pancreas to neutralize stomach acid.: a
2. 2. Enzymes that digest the triacylglycerols into 2 free fatty acids and
monoa- cylglycerol are called
a. hydrolyases.
b. peptidases.
c. reductases.
d. lipases.
e. glycolyases.: d
3. 3. Caloric homeostasis or the ability to maintain adequate energy stores is regulated by different hormones.
What is the function of glucagon-like peptide (GLP-1) in this process? GLP-1
a. is produced and released by the pancreas and reports on the availability of proteins.
, BIOCHEMISTRY Study Guides compiled (2016-2020)
b. serves as a short-term signal and stimulates satiety.
c. serves as a long-term signal and stimulates appetite in response to hunger.
d. deficiency causes obesity due to overeating.
e. plays an important role as a long-term signal and controls the release of stomach acid.: b
4. 4. Which of the following pathways functions as both catabolic and anabolic depending on the needs of the
cell?
a. glycolysis
b. gluconeogenesis
c. citric acid cycle
d. electron transport chain
e. glycogen synthesis: c
5. 5. Which statement about metabolic concepts is CORRECT?
a. GDP is the universal currency of free energy.
b. Catabolic pathways use ATP and reducing power to synthesize large mole- cules.
, BIOCHEMISTRY Study Guides compiled (2016-2020)
c. Fats are a more energy efficient food source than glucose, because the carbons in fats are more reduced.
d. A reaction occurs spontaneously only if ”G (change in free energy) is positive.
e. Coenzyme A is an activated carrier of phosphoryl groups and the transfer of phosphoryl groups onto lipids
generates NADPH.: c
6. 6. Which statement about
FAD is FALSE? FAD
a. is a carrier of electrons for fuel oxidation.
b. has an isoalloxazine ring as the reactive part.
c. is derived from the vitamin riboflavin, which is a B-vitamin.
d. is the electron donor for biosynthetic pathways.
e. stands for flavin adenine dinucleotide: d
7. 7. Which statement about the function of the glycolytic enzyme enolase is
FALSE? Enolase
a. generates ATP by substrate-level phosphorylation.
b. catalyzes a reversible reaction.
c. is inhibited by fluoride that is present in toothpaste and drinking water.
d. catalyzes a dehydration reaction by removing a molecule of water.
e. produces phosphoenolpyruvate.: a
8. 8. In
, BIOCHEMISTRY Study Guides compiled (2016-2020)
glycolysis, phosphoglycerate kinase converts to
.
a. glycerol; glyceraldehyde 3-phosphate
b. 3-phosphoglycerate; 2-phosphoglycerate
c. 1,3-bisphosphoglycerate; 3-phosphoglycerate
d. glyceraldehyde 3-phosphate; 1,3-bisphosphoglycerate
e. fructose 6-phosphate; glycerate 1,6-bisphosphate: c
9. 9. The two ATP-producing reactions of glycolysis are catalyzed by the enzymes
a. fructokinase and aldolase.
b. glyceraldehyde 3-phosphate dehydrogenase and protein kinase A.
c. phosphoglycerate kinase and pyruvate kinase.
d. hexokinase and phosphofructokinase.
e. phosphoglucose isomerase and triosephosphate isomerase.: c
10. 10. When oxygen is limiting
(anaerobic conditions) during intense exer- cise, the skeletal muscle converts pyruvate into
a. ethanol.
b. glucose.
c. glycerol.
