BIO 181 CAPCO ASU EXAM 3 FINAL 2026
MOCK EXAM PRACTICE SET WITH
SOLUTIONS A+
◉ Which level of protein structure? Answer: Quaternary
◉ The name of a conceptual model for enzyme action Answer: Lock
and Key, Induced Fit
◉ Which level of protein structure is shown in the picture below?
Answer: Primary
◉ Which level of protein structure is shown in the picture below for
the two proteins? Answer: tertiary
◉ Would the subsitution (due to a mutation) of alanine
(hydrophobic amino acid) for serine (a polar and hydrophobic
amino acid) have a large or small effect on the structure of a protein?
Answer: Yes, likely a large effect. The substitution of two chemically
very different amino acids could have a large effect on protein
structure.
,◉ What type of chemical bond is important for stabilizing alpha-
helix or Beta-sheets between backbone atoms of amino acids in
close proximity to one another? Answer: Hydrogen bonds
◉ If a protein is subject to changes in temperature, pH, or exposure
to chemicals this may result in: Answer: Denaturation
◉ The image below shows what type of chemical compound?
Answer: Triacylglycerol
◉ The image below shows what kind of compound? Answer: Lipid
A sterol, specifically cholesterol
◉ What kinds of structure will the following compound, a
phospholipid, form in a watery environment? Answer: Membrane
Micelle
Liposome
◉ With the complementarity of nucleic acids in mind (in DNA
strands) answer the following question.
A particular stretch of DNA is sequenced and found to be 40%
Guanine. What percentage will be Adenine? Answer: 10%
, ◉ Which of the following macromolecules is most likely to form into
a double helix? Answer: Nucleic Acid: DNA
◉ Which side will generally have a greater amount of matter
present? The reactants or the products? Answer: Both will be equal.
◉ When plants capture energy in the photons of sunlight and
convert that energy into the chemical bonds of organic molecules,
are they creating new energy? Answer: No, the energy is being
transferred from one form into another. But no new energy is being
created.
◉ The Second Law of Thermodynamics suggest that the energy in a
system will... Answer: tend to become more dispersed over time.
◉ Biological systems sometimes appear on the surface to break the
Second Law of Thermodynamics - by seemingly increasing the order
in the overall system. They don't. Why? Answer: a. Earth (and living
things on it) are not a closed system. The sun's constant input of
energy in the form of photons is harnessed by living things to create
internal order within themselves. But without such a constant input
of energy, most biological systems on earth would break down.
b. The Second Law tells us that no natural process can occur unless
it is also associated with an increase in the entropy of the universe. A
living organism (such as an animal or plant) brings in matter and
MOCK EXAM PRACTICE SET WITH
SOLUTIONS A+
◉ Which level of protein structure? Answer: Quaternary
◉ The name of a conceptual model for enzyme action Answer: Lock
and Key, Induced Fit
◉ Which level of protein structure is shown in the picture below?
Answer: Primary
◉ Which level of protein structure is shown in the picture below for
the two proteins? Answer: tertiary
◉ Would the subsitution (due to a mutation) of alanine
(hydrophobic amino acid) for serine (a polar and hydrophobic
amino acid) have a large or small effect on the structure of a protein?
Answer: Yes, likely a large effect. The substitution of two chemically
very different amino acids could have a large effect on protein
structure.
,◉ What type of chemical bond is important for stabilizing alpha-
helix or Beta-sheets between backbone atoms of amino acids in
close proximity to one another? Answer: Hydrogen bonds
◉ If a protein is subject to changes in temperature, pH, or exposure
to chemicals this may result in: Answer: Denaturation
◉ The image below shows what type of chemical compound?
Answer: Triacylglycerol
◉ The image below shows what kind of compound? Answer: Lipid
A sterol, specifically cholesterol
◉ What kinds of structure will the following compound, a
phospholipid, form in a watery environment? Answer: Membrane
Micelle
Liposome
◉ With the complementarity of nucleic acids in mind (in DNA
strands) answer the following question.
A particular stretch of DNA is sequenced and found to be 40%
Guanine. What percentage will be Adenine? Answer: 10%
, ◉ Which of the following macromolecules is most likely to form into
a double helix? Answer: Nucleic Acid: DNA
◉ Which side will generally have a greater amount of matter
present? The reactants or the products? Answer: Both will be equal.
◉ When plants capture energy in the photons of sunlight and
convert that energy into the chemical bonds of organic molecules,
are they creating new energy? Answer: No, the energy is being
transferred from one form into another. But no new energy is being
created.
◉ The Second Law of Thermodynamics suggest that the energy in a
system will... Answer: tend to become more dispersed over time.
◉ Biological systems sometimes appear on the surface to break the
Second Law of Thermodynamics - by seemingly increasing the order
in the overall system. They don't. Why? Answer: a. Earth (and living
things on it) are not a closed system. The sun's constant input of
energy in the form of photons is harnessed by living things to create
internal order within themselves. But without such a constant input
of energy, most biological systems on earth would break down.
b. The Second Law tells us that no natural process can occur unless
it is also associated with an increase in the entropy of the universe. A
living organism (such as an animal or plant) brings in matter and
