BCH 361 Final Exam with Actual
\Questions and Answers Latest
Updated
2025/2026 (Graded A+
The elements that are essential for life, and make up over 90% of cellular dry
weight include: - ANSWER- *CHNOPS*
Carbon
Hydrogen
Nitrogen
Oxygen
Phosphorus
Sulfur
The redox cofactor ubiquinone is necessary for converting energy from
electron transport to the form of chemical bond energy in ATP. In which
organelle would you expect to find most ubiquinone? - ANSWER-
Mitochondria
Ribosomes, the protein synthesis complex, are often bound to
which organelle? -
ANSWER- Rough endoplasmic
reticulum
in Eukaryotic cells what organelle possesses a double membrane
system? - ANSWER-
Mitochondria &
Nucleus
Osmosis occurs in order to relieve concentration gradients across membrane.
is cells are placed in HYPOtonic solution they will swell and burst as water
rushes in to relieve the gradient. this process is known as .. - ANSWER-
Hemolysis
The property of water that is most responsible for its unique thermal
properties and
utility as a biological solvent is: - ANSWER- Hydrogen
Bonding
Aspartate and lysine are in the active site of an enzyme. They are both
known to participate directly in catalysis, the pKa's of the residues are found
to be 3.2 and 9.6. The optimum pH for the enzyme is 6.4. Which forms of
these 2 residues will predominate when the enzyme is most active? -
ANSWER- Aspartate is deprotonated; Lysine is protonated
BCH 361 Final Exam with Actual Questions and Answers Latest Updated 2025-
2026 (Graded A+
, When a song acid is added to a buffer system what reaction occurs to
neutralize the acid and resist large changes in pH? - ANSWER- The conjugate
base will react with the protons making more of the weak acid
The conjugate base for HPO4^2- is... - ANSWER- PO4^3-
Calculate the pH of a mixture of 0.30M acetic Acid and 0.10 M sodium
acetate . The Ka
of acetic acid is 1.73 x10^-5. - ANSWER-
4.28
For an endothermic reaction the be spontaneous, what must occur? -
ANSWER- The
entropy must increase
substantially
the oxidation of glucose molecules to form CO2 and H2O is a __________
process. -
ANSWER-
Exergonic
Which AA does not exhibit chirality? - ANSWER- Glycine
Interactions in which form alpha-helices and beta-sheets give rise to _____
structure
while interactions between two subunits constitute ______ structure. -
ANSWER-
secondar
y
quaterna
ry
An AAA has a allow acidic pI value. What AA is it likely to be? - ANSWER-
Aspartic Acid
The R-groups of which AA could participate in the formation of salt bridge
electrostatic
interaction? - ANSWER- Lysine &
Glutamate
What level of protein structure involves hydrophobic interaction, electrostatic
interactions, hydrogen bonds and covalent bonds between the side chains of
AA that are far apart in the AA sequence? - ANSWER- Tertiary structure
The geometric character of the peptide bond could best be described as -
ANSWER-
planar and
rigid
which factor contributes to primary structure? - ANSWER- AA sequence
Invariant AA in a protein are presumed.. - ANSWER- to be essential to the
structure and
function of the
BCH 361 Final Exam with Actual Questions and Answers Latest Updated 2025-
2026 (Graded A+
\Questions and Answers Latest
Updated
2025/2026 (Graded A+
The elements that are essential for life, and make up over 90% of cellular dry
weight include: - ANSWER- *CHNOPS*
Carbon
Hydrogen
Nitrogen
Oxygen
Phosphorus
Sulfur
The redox cofactor ubiquinone is necessary for converting energy from
electron transport to the form of chemical bond energy in ATP. In which
organelle would you expect to find most ubiquinone? - ANSWER-
Mitochondria
Ribosomes, the protein synthesis complex, are often bound to
which organelle? -
ANSWER- Rough endoplasmic
reticulum
in Eukaryotic cells what organelle possesses a double membrane
system? - ANSWER-
Mitochondria &
Nucleus
Osmosis occurs in order to relieve concentration gradients across membrane.
is cells are placed in HYPOtonic solution they will swell and burst as water
rushes in to relieve the gradient. this process is known as .. - ANSWER-
Hemolysis
The property of water that is most responsible for its unique thermal
properties and
utility as a biological solvent is: - ANSWER- Hydrogen
Bonding
Aspartate and lysine are in the active site of an enzyme. They are both
known to participate directly in catalysis, the pKa's of the residues are found
to be 3.2 and 9.6. The optimum pH for the enzyme is 6.4. Which forms of
these 2 residues will predominate when the enzyme is most active? -
ANSWER- Aspartate is deprotonated; Lysine is protonated
BCH 361 Final Exam with Actual Questions and Answers Latest Updated 2025-
2026 (Graded A+
, When a song acid is added to a buffer system what reaction occurs to
neutralize the acid and resist large changes in pH? - ANSWER- The conjugate
base will react with the protons making more of the weak acid
The conjugate base for HPO4^2- is... - ANSWER- PO4^3-
Calculate the pH of a mixture of 0.30M acetic Acid and 0.10 M sodium
acetate . The Ka
of acetic acid is 1.73 x10^-5. - ANSWER-
4.28
For an endothermic reaction the be spontaneous, what must occur? -
ANSWER- The
entropy must increase
substantially
the oxidation of glucose molecules to form CO2 and H2O is a __________
process. -
ANSWER-
Exergonic
Which AA does not exhibit chirality? - ANSWER- Glycine
Interactions in which form alpha-helices and beta-sheets give rise to _____
structure
while interactions between two subunits constitute ______ structure. -
ANSWER-
secondar
y
quaterna
ry
An AAA has a allow acidic pI value. What AA is it likely to be? - ANSWER-
Aspartic Acid
The R-groups of which AA could participate in the formation of salt bridge
electrostatic
interaction? - ANSWER- Lysine &
Glutamate
What level of protein structure involves hydrophobic interaction, electrostatic
interactions, hydrogen bonds and covalent bonds between the side chains of
AA that are far apart in the AA sequence? - ANSWER- Tertiary structure
The geometric character of the peptide bond could best be described as -
ANSWER-
planar and
rigid
which factor contributes to primary structure? - ANSWER- AA sequence
Invariant AA in a protein are presumed.. - ANSWER- to be essential to the
structure and
function of the
BCH 361 Final Exam with Actual Questions and Answers Latest Updated 2025-
2026 (Graded A+
