BIOC 384 FINAL EXAM QUESTIONS
WITH COMPLETE SOLUTION
2025/2026
The birth of modern biochemistry can be traced to the
Question 1 options:
end of the 19th century.
end of the 20th century.
beginning of the 19th century.
beginning of the 21st century. - correct answer ✔end of the 19th century.
Enzymes function as reaction catalysts in cells. If the enzymes were removed from a cell, the rate of
biochemical reactions would
Question 2 options:
increase.
remain the same.
decrease.
It is impossible to know. - correct answer ✔decrease.
The essential ions calcium, magnesium, potassium, and sodium are all
Question 3 options:
anions.
cations.
transition metals.
halogens. - correct answer ✔cations.
,The __________ differentiates amino acids from one another.
Question 4 options:
number of silane groups
number of phosphoryl groups
side chains attached to the central carbon
number of hydroxyl groups - correct answer ✔side chains attached to the central carbon
Why are fewer polypeptide sequences encountered biologically than are theoretically possible?
Question 5 options:
There is no way to make all the theoretical possibilities.
The phosphodiester linkages don't allow for all the possibilities.
Not all have useful structural and functional properties.
Not all of the possibilities can be broken down. - correct answer ✔Not all have useful structural and
functional properties.
If a plasma membrane is hydrophobic, what kinds of amino acids are MOST likely to be found in the
membrane?
Question 6 options:
hydrophilic amino acids
hydrophobic amino acids
polar amino acids
charged amino acids - correct answer ✔hydrophobic amino acids
An inherited disease comes from the mutation of DNA in a __________ cell.
Question 7 options:
somatic
,germ-line
adipose
blood - correct answer ✔germ-line
The RNA world model is based on the hypothesis that __________ is stable.
Question 8 options:
RNA
DNA
uracil
adenine - correct answer ✔DNA
The appearance of new gene speciation is an example of
Question 9 options:
gene multiplication.
gene singulation.
gene duplication.
random mutation. - correct answer ✔gene singulation.
The amino acid sequence of a protein determines its structure. Which of the following statements is
true?
Question 10 options:
Two proteins with similar amino acid sequence should have similar structures.
Two proteins with different amino acid sequences will have identical structures.
Two proteins with similar amino acid sequences will always have the same function in a cell.
It is impossible to determine how proteins will fold based on the amino acid sequence alone. - correct
answer ✔Two proteins with similar amino acid sequence should have similar structures.
, Which of the following is NOT a common functional group?
Question 11 options:
COOH
CH3
SH
CHO - correct answer ✔CHO
The proposal that DNA is a double helix was based on what experimental evidence?
Question 12 options:
NMR
IR
HPLC
x-ray crystallography - correct answer ✔x-ray crystallography
What side products of pyruvate are being converted into alcohol and carbon dioxide by yeast?
Question 13 options:
CO and NADH
CO2 and NADH
CO2 and NAD+
CO and NAD+ - correct answer ✔CO2 and NAD+
Pyruvate decarboxylase converts pyruvate into
Question 14 options:
carbon dioxide and acetaldehyde.
WITH COMPLETE SOLUTION
2025/2026
The birth of modern biochemistry can be traced to the
Question 1 options:
end of the 19th century.
end of the 20th century.
beginning of the 19th century.
beginning of the 21st century. - correct answer ✔end of the 19th century.
Enzymes function as reaction catalysts in cells. If the enzymes were removed from a cell, the rate of
biochemical reactions would
Question 2 options:
increase.
remain the same.
decrease.
It is impossible to know. - correct answer ✔decrease.
The essential ions calcium, magnesium, potassium, and sodium are all
Question 3 options:
anions.
cations.
transition metals.
halogens. - correct answer ✔cations.
,The __________ differentiates amino acids from one another.
Question 4 options:
number of silane groups
number of phosphoryl groups
side chains attached to the central carbon
number of hydroxyl groups - correct answer ✔side chains attached to the central carbon
Why are fewer polypeptide sequences encountered biologically than are theoretically possible?
Question 5 options:
There is no way to make all the theoretical possibilities.
The phosphodiester linkages don't allow for all the possibilities.
Not all have useful structural and functional properties.
Not all of the possibilities can be broken down. - correct answer ✔Not all have useful structural and
functional properties.
If a plasma membrane is hydrophobic, what kinds of amino acids are MOST likely to be found in the
membrane?
Question 6 options:
hydrophilic amino acids
hydrophobic amino acids
polar amino acids
charged amino acids - correct answer ✔hydrophobic amino acids
An inherited disease comes from the mutation of DNA in a __________ cell.
Question 7 options:
somatic
,germ-line
adipose
blood - correct answer ✔germ-line
The RNA world model is based on the hypothesis that __________ is stable.
Question 8 options:
RNA
DNA
uracil
adenine - correct answer ✔DNA
The appearance of new gene speciation is an example of
Question 9 options:
gene multiplication.
gene singulation.
gene duplication.
random mutation. - correct answer ✔gene singulation.
The amino acid sequence of a protein determines its structure. Which of the following statements is
true?
Question 10 options:
Two proteins with similar amino acid sequence should have similar structures.
Two proteins with different amino acid sequences will have identical structures.
Two proteins with similar amino acid sequences will always have the same function in a cell.
It is impossible to determine how proteins will fold based on the amino acid sequence alone. - correct
answer ✔Two proteins with similar amino acid sequence should have similar structures.
, Which of the following is NOT a common functional group?
Question 11 options:
COOH
CH3
SH
CHO - correct answer ✔CHO
The proposal that DNA is a double helix was based on what experimental evidence?
Question 12 options:
NMR
IR
HPLC
x-ray crystallography - correct answer ✔x-ray crystallography
What side products of pyruvate are being converted into alcohol and carbon dioxide by yeast?
Question 13 options:
CO and NADH
CO2 and NADH
CO2 and NAD+
CO and NAD+ - correct answer ✔CO2 and NAD+
Pyruvate decarboxylase converts pyruvate into
Question 14 options:
carbon dioxide and acetaldehyde.
