BIOC 384 Final Question and answers
already passed 2025/2026
The study of biochemistry attempts to explain
A. chemical processes at the atomic level.
B. biological processes at the molecular and cellular level.
C. the nature of life.
D. physical processes at the macromolecular level. - correct answer ✔B
The __________ differentiates amino acids from one another.
A. number of silane groups
B. number of phosphoryl groups
C. side chains attached to the central carbon
D. number of hydroxyl groups - correct answer ✔C
If the concentration of aspartate in the cell decreased, what would be the predicted outcome?
A. increased concentration of argininosuccinate
B. decreased concentration of citrulline
C. decreased concentration of fumarate
D. increased concentration of arginine - correct answer ✔C
Plasmids are small, circular DNA molecules that are used in which of the following?
,A. gene cloning
B. production of chromatin
C. cell movement
D. replication of nucleus - correct answer ✔A
A hydrogen bond can best be described as a
A. strong covalent interaction.
B. strong ionic interaction.
C. weak noncovalent interaction.
D. weak covalent interaction. - correct answer ✔C
Given a DNA sequence of -CAT-, what is the complementary sequence in mRNA?
A. 5'-GUA-3'
B. 5'-AUG-3'
C. 3'-GUA-5'
D. 5'-GTA-3' - correct answer ✔A
Bioinformatics shows that 98% of human DNA is identical to that of chimpanzees. If human DNA
contains 3.2 billion nucleotides, how many nucleotides are different between the two species?
A. 3.1 billion
B. 64 million
C. 3.1 million
,D. 640 million - correct answer ✔B
Highly conserved gene sequences that encode proteins with the same function in different organisms
are called __________ genes.
A. orthologous
B. conserved
C. parallel
D. antiparallel - correct answer ✔A
In DNA the phosphate groups are on the outside of the helix. Why does this stabilize the structure?
A. ionic interactions with the solvent
B. hydrogen bonding with itself
C. covalent binding to the solvent
D. It does not stabilize the structure. - correct answer ✔A
What is the cause of the overall negative charge of a molecule of DNA?
A. hydrogen bonding between base pairs
B. the phosphate backbone
C. the sugars
D. the antiparallel orientation of the DNA - correct answer ✔B
The DNA double helix is stabilized by the interactions between nucleotides because of __________
between nucleotides.
, A. hydrogen bonding
B. pi-pi stacking
C. sigma bonds
D. ionic interactions - correct answer ✔B
What side products of pyruvate are being converted into alcohol and carbon dioxide by yeast?
A. CO and NADH
B. CO2 and NADH
C. CO2 and NAD+
D. CO and NAD+ - correct answer ✔C
A requirement for a covalent bond to form between two atoms is that
A. there are unpaired electrons on each atom.
B. the atoms are ions.
C. both the atoms must be metals.
D. one of the atoms must be a halogen. - correct answer ✔A
The correct name for the VSEPR arrangement around a carbon in methane is
A. linear.
B. trigonal bipyrimidal.
C. tetrahedral.
already passed 2025/2026
The study of biochemistry attempts to explain
A. chemical processes at the atomic level.
B. biological processes at the molecular and cellular level.
C. the nature of life.
D. physical processes at the macromolecular level. - correct answer ✔B
The __________ differentiates amino acids from one another.
A. number of silane groups
B. number of phosphoryl groups
C. side chains attached to the central carbon
D. number of hydroxyl groups - correct answer ✔C
If the concentration of aspartate in the cell decreased, what would be the predicted outcome?
A. increased concentration of argininosuccinate
B. decreased concentration of citrulline
C. decreased concentration of fumarate
D. increased concentration of arginine - correct answer ✔C
Plasmids are small, circular DNA molecules that are used in which of the following?
,A. gene cloning
B. production of chromatin
C. cell movement
D. replication of nucleus - correct answer ✔A
A hydrogen bond can best be described as a
A. strong covalent interaction.
B. strong ionic interaction.
C. weak noncovalent interaction.
D. weak covalent interaction. - correct answer ✔C
Given a DNA sequence of -CAT-, what is the complementary sequence in mRNA?
A. 5'-GUA-3'
B. 5'-AUG-3'
C. 3'-GUA-5'
D. 5'-GTA-3' - correct answer ✔A
Bioinformatics shows that 98% of human DNA is identical to that of chimpanzees. If human DNA
contains 3.2 billion nucleotides, how many nucleotides are different between the two species?
A. 3.1 billion
B. 64 million
C. 3.1 million
,D. 640 million - correct answer ✔B
Highly conserved gene sequences that encode proteins with the same function in different organisms
are called __________ genes.
A. orthologous
B. conserved
C. parallel
D. antiparallel - correct answer ✔A
In DNA the phosphate groups are on the outside of the helix. Why does this stabilize the structure?
A. ionic interactions with the solvent
B. hydrogen bonding with itself
C. covalent binding to the solvent
D. It does not stabilize the structure. - correct answer ✔A
What is the cause of the overall negative charge of a molecule of DNA?
A. hydrogen bonding between base pairs
B. the phosphate backbone
C. the sugars
D. the antiparallel orientation of the DNA - correct answer ✔B
The DNA double helix is stabilized by the interactions between nucleotides because of __________
between nucleotides.
, A. hydrogen bonding
B. pi-pi stacking
C. sigma bonds
D. ionic interactions - correct answer ✔B
What side products of pyruvate are being converted into alcohol and carbon dioxide by yeast?
A. CO and NADH
B. CO2 and NADH
C. CO2 and NAD+
D. CO and NAD+ - correct answer ✔C
A requirement for a covalent bond to form between two atoms is that
A. there are unpaired electrons on each atom.
B. the atoms are ions.
C. both the atoms must be metals.
D. one of the atoms must be a halogen. - correct answer ✔A
The correct name for the VSEPR arrangement around a carbon in methane is
A. linear.
B. trigonal bipyrimidal.
C. tetrahedral.
