Exam 3 BICH410 Kurouski || 100% Verified.
All but which of the following structures contain glycosidic bonds?
a. Nucleic acids
b. Proteoglycans
c. Cell surface receptors of red blood cells
d. Peptidoglycan of bacterial cell walls
e. All of the above contain glycosidic bonds correct answers E
2.
Which of the following would best describe the role of heparin
a. Anticoagulant
b. Blood thinner
c. Protease inhibitor
d. Cofactor
e. a and b correct answers E
Concerning the structure glucose, which pf the following statements is false?
a. Galactose is an epimer of glucose
b. Glucopyranose structures are also anomers
c. D-and L-glucose molecules are enantiomers
d. Glucose and fructose are isomers
e. Glucose cyclizes via formation of a hemiketal correct answers E
Erythrulose is described as a:
a. Ketotriose
b. Ketotetrose
C. Aldotriose
d. Aldotetrase correct answers B
5. Ketoses and aldoses are:
a. Epimers b. anomers c. enantiomers d. isomers correct answers D
Which of the above is a polymer composed of monosaccharides that are glucose derivatives?
a. Chitin
b. Cellulose
c. Lactose
d. Amylopectin
e. Glycogen correct answers A. Chitin
Which of the above is comprised solely of glucose molecules and is highly water insoluble?
a. Chitin
b. Cellulose
c. Lactose
d. Amylopectin
, e. Glycogen correct answers B. Cellulose
The enzyme amylase targets which of the following structures?
a. Chitin
b. Cellulose
c. Lactose
d. Amylopectin
e. Glycogen correct answers D. Amylopectin
The following image is an example of which type of linkages
based on bond shown at arrow?
a. B(1->4) linkage
b. B(1->6) linkage
c. B (1->2) linkage
d. a(1->4) linkage
e. a(1->6) linkage correct answers B
10. The structure of ribose as part of nucleic acids is best described by which of the following
statements?
a. Ribose utilizes N-glycosidic linkage for attachment to the nitrogenous base
b. Ribose utilizes B(1->4) glycosidic bonds to the nitrogenous base
C. Ribose forms a glycosidic bond with the nitrogenous base through a hydrolysis reaction
d. a and b
e. a, b, c correct answers A
11. Which of the following statements concerning triose phosphate isomerase (TPI) is false?
a. Catalyzes a reaction interconverting an aldohexose to a ketohexose
b.Utilizes and general acid/base mechanism.
c. TPI is a catalytically perfect enzyme.
d. Contains the residue glutamate in the active site that operates as a base
e. None of the above is false. correct answers A
12. All of the following statements accurately describe glucose except which of the following
a. Glucopyranose is the cyclic form N
b. D-Glucose is the central hexose for metabolism
c. Glucose in humans is stored as amylopectin
d. The human brain functions on glucose
e. Glucose cyclizes through formation of a hemiacetal N correct answers C
13. The cyclization of fructose involves the ___acting as a nucleophile and attacking the ___,
forming a ___- membered ring.
a. C1-Carbonyt, C5-alcohol, 5
b. C5-Atcohol, C1-Carbonyl, 6
C. C2-Carbonyl, C5-alcohol, 5
d. C5-Alcohol, C2-Carbonyl, 5
e. none of the above correct answers d
All but which of the following structures contain glycosidic bonds?
a. Nucleic acids
b. Proteoglycans
c. Cell surface receptors of red blood cells
d. Peptidoglycan of bacterial cell walls
e. All of the above contain glycosidic bonds correct answers E
2.
Which of the following would best describe the role of heparin
a. Anticoagulant
b. Blood thinner
c. Protease inhibitor
d. Cofactor
e. a and b correct answers E
Concerning the structure glucose, which pf the following statements is false?
a. Galactose is an epimer of glucose
b. Glucopyranose structures are also anomers
c. D-and L-glucose molecules are enantiomers
d. Glucose and fructose are isomers
e. Glucose cyclizes via formation of a hemiketal correct answers E
Erythrulose is described as a:
a. Ketotriose
b. Ketotetrose
C. Aldotriose
d. Aldotetrase correct answers B
5. Ketoses and aldoses are:
a. Epimers b. anomers c. enantiomers d. isomers correct answers D
Which of the above is a polymer composed of monosaccharides that are glucose derivatives?
a. Chitin
b. Cellulose
c. Lactose
d. Amylopectin
e. Glycogen correct answers A. Chitin
Which of the above is comprised solely of glucose molecules and is highly water insoluble?
a. Chitin
b. Cellulose
c. Lactose
d. Amylopectin
, e. Glycogen correct answers B. Cellulose
The enzyme amylase targets which of the following structures?
a. Chitin
b. Cellulose
c. Lactose
d. Amylopectin
e. Glycogen correct answers D. Amylopectin
The following image is an example of which type of linkages
based on bond shown at arrow?
a. B(1->4) linkage
b. B(1->6) linkage
c. B (1->2) linkage
d. a(1->4) linkage
e. a(1->6) linkage correct answers B
10. The structure of ribose as part of nucleic acids is best described by which of the following
statements?
a. Ribose utilizes N-glycosidic linkage for attachment to the nitrogenous base
b. Ribose utilizes B(1->4) glycosidic bonds to the nitrogenous base
C. Ribose forms a glycosidic bond with the nitrogenous base through a hydrolysis reaction
d. a and b
e. a, b, c correct answers A
11. Which of the following statements concerning triose phosphate isomerase (TPI) is false?
a. Catalyzes a reaction interconverting an aldohexose to a ketohexose
b.Utilizes and general acid/base mechanism.
c. TPI is a catalytically perfect enzyme.
d. Contains the residue glutamate in the active site that operates as a base
e. None of the above is false. correct answers A
12. All of the following statements accurately describe glucose except which of the following
a. Glucopyranose is the cyclic form N
b. D-Glucose is the central hexose for metabolism
c. Glucose in humans is stored as amylopectin
d. The human brain functions on glucose
e. Glucose cyclizes through formation of a hemiacetal N correct answers C
13. The cyclization of fructose involves the ___acting as a nucleophile and attacking the ___,
forming a ___- membered ring.
a. C1-Carbonyt, C5-alcohol, 5
b. C5-Atcohol, C1-Carbonyl, 6
C. C2-Carbonyl, C5-alcohol, 5
d. C5-Alcohol, C2-Carbonyl, 5
e. none of the above correct answers d
