MCB 450 EXAM 1 [2026] UPDATED ACTUAL Exam |
Question and Answer | A+ VERIFIED ANSWERS &
UPDATED REVIEW
• Water is said to be highly cohesive because water molecules interact with one
another through...
a. van der waals interactions
b. hydrogen bonds
c. hydrophobic interactions
d. covalent bonding -✓✓ Hydrogen Bonds
• which of the following secondary structures is most likely to be found in a
membrane-embedded portion of a protein?
a. a single extended beta strand
b. an alpha helical coiled coil
c. an alpha helix composed entirely of hydrophobic residues
d. an open antiparallel beta sheet composed of hydrophobic residues
e. an open parallel beta sheet composed of hydrophilic residues -✓✓ an alpha
helix composed entirely of hydrophobic residues
• denature of proteins by gastric acids is due to the disruption of _____ by low pH
a. peptide bonds
b. ionic and hydrogen bonds
c. ester bonds
d. disulfide bridges
e. hydrophobic interactions -✓✓ ionic and hydrogen bonds
,• what is the function of ApoCII in the chylomicrons?
a. it is necessary for the activation of lipoprotein lipase
b. it is the structure protein for the formation of chylomicrons
c. it is recognized by hepatic receptors for recycling
d. it is required for the transportation of chylomicrons in the blood
e. it is involved in the re synthesis of TAG in the small intestine -✓✓ it is necessary
for the activation of lipoprotein lipase
• Which of the following is necessarily characterized by a covalent linkage
a. induced fit
b. van der waals interaction
c. disulfide bond
d. base - pairing interaction
e. hydrogen bond -✓✓ disulfide bond (hydrogen bond was marked correct on Lon
capa)
• Terrestrial vertebrates use the urea cycle to convert the ammonium ion to urea
such that the urea can be excreted. In the production of urea, only one of the
nitrogens in the product comes from ammonium ions. What is the source of the
other nitrogen?
a. fumarate
b. carbamoyl phosphate
c. aspartate
d. another molecule of glutamate -✓✓ aspartate
,• Which of the following compounds serves as an acceptor for the amino groups
of may amino acids during catabolism?
a. glutatmine
b. asparagine
c. oxalate
d. a-ketoglutarate -✓✓ a-ketogultarate
• During the synthesis of pyrimidine nucleotides, the pyrimidine ring framework
the becomes attached to the ribose is ____
a. uracil
b. cytosine
c. orotate
d. adenine -✓✓ orotate
• which of the following can be used for treatment of gout?
a. 5-fluorouracil
b. sulfonamides
c. colchicine
d. methotrexate -✓✓ colchicine
• which of the following is the ultimate electron acceptor in oxidative
phosphorylation?
a. oxygen
b. coenzyme Q
c. ADP
, d. cytochrome C
e. ATP -✓✓ oxygen
• a diet pill that acts to increase oxygen consumption and a high amount of
electron transport without ATP production is likely what kind of compound?
a. cyanide
b. site II activator
c. ATP synthase activator
d. site I inhibitor
e. uncoupler -✓✓ uncoupler
• Formation of the linkages that join the amino acids in a polypeptide involves:
a. formation of two carbon-carbon bonds per linkage formed
b. elimination of one molecule of carbon dioxide per linkage formed
c. formation of one carbon-carbon bond per linkage formed
d. elimination of one water molecule per linkage formed -✓✓ elimination of one
water molecule per linkage formed
• which of the following molecules are the major components of the membrane?
a. nucleic acids
b. carbohydrates
c. proteins
d. lipids -✓✓ lipids
Question and Answer | A+ VERIFIED ANSWERS &
UPDATED REVIEW
• Water is said to be highly cohesive because water molecules interact with one
another through...
a. van der waals interactions
b. hydrogen bonds
c. hydrophobic interactions
d. covalent bonding -✓✓ Hydrogen Bonds
• which of the following secondary structures is most likely to be found in a
membrane-embedded portion of a protein?
a. a single extended beta strand
b. an alpha helical coiled coil
c. an alpha helix composed entirely of hydrophobic residues
d. an open antiparallel beta sheet composed of hydrophobic residues
e. an open parallel beta sheet composed of hydrophilic residues -✓✓ an alpha
helix composed entirely of hydrophobic residues
• denature of proteins by gastric acids is due to the disruption of _____ by low pH
a. peptide bonds
b. ionic and hydrogen bonds
c. ester bonds
d. disulfide bridges
e. hydrophobic interactions -✓✓ ionic and hydrogen bonds
,• what is the function of ApoCII in the chylomicrons?
a. it is necessary for the activation of lipoprotein lipase
b. it is the structure protein for the formation of chylomicrons
c. it is recognized by hepatic receptors for recycling
d. it is required for the transportation of chylomicrons in the blood
e. it is involved in the re synthesis of TAG in the small intestine -✓✓ it is necessary
for the activation of lipoprotein lipase
• Which of the following is necessarily characterized by a covalent linkage
a. induced fit
b. van der waals interaction
c. disulfide bond
d. base - pairing interaction
e. hydrogen bond -✓✓ disulfide bond (hydrogen bond was marked correct on Lon
capa)
• Terrestrial vertebrates use the urea cycle to convert the ammonium ion to urea
such that the urea can be excreted. In the production of urea, only one of the
nitrogens in the product comes from ammonium ions. What is the source of the
other nitrogen?
a. fumarate
b. carbamoyl phosphate
c. aspartate
d. another molecule of glutamate -✓✓ aspartate
,• Which of the following compounds serves as an acceptor for the amino groups
of may amino acids during catabolism?
a. glutatmine
b. asparagine
c. oxalate
d. a-ketoglutarate -✓✓ a-ketogultarate
• During the synthesis of pyrimidine nucleotides, the pyrimidine ring framework
the becomes attached to the ribose is ____
a. uracil
b. cytosine
c. orotate
d. adenine -✓✓ orotate
• which of the following can be used for treatment of gout?
a. 5-fluorouracil
b. sulfonamides
c. colchicine
d. methotrexate -✓✓ colchicine
• which of the following is the ultimate electron acceptor in oxidative
phosphorylation?
a. oxygen
b. coenzyme Q
c. ADP
, d. cytochrome C
e. ATP -✓✓ oxygen
• a diet pill that acts to increase oxygen consumption and a high amount of
electron transport without ATP production is likely what kind of compound?
a. cyanide
b. site II activator
c. ATP synthase activator
d. site I inhibitor
e. uncoupler -✓✓ uncoupler
• Formation of the linkages that join the amino acids in a polypeptide involves:
a. formation of two carbon-carbon bonds per linkage formed
b. elimination of one molecule of carbon dioxide per linkage formed
c. formation of one carbon-carbon bond per linkage formed
d. elimination of one water molecule per linkage formed -✓✓ elimination of one
water molecule per linkage formed
• which of the following molecules are the major components of the membrane?
a. nucleic acids
b. carbohydrates
c. proteins
d. lipids -✓✓ lipids
