1|Page
ACS BIOCHEMISTRY EXAM NEWEST ACTUAL
EXAM WITH COMPLETE QUESTIONS AND
CORRECT VERIFIED ANSWERS (DETAILED
ANSWERS) ALREADY GRADED A+ 100%
GUARANTEED TO PASS CONCEPTS!!!
Metabolism (catabolism and anabolism) - ....ANSWER
....✔✔ Metabolism: sum of total chemical reactions in
an organism, also the method by which cells extract and
use energy from their environment.
Catabolism: The process by which stored nutrients and
ingested foods are converted to a usable form of
energy. It produces simple products CO2, H2O, NH3,
and building blocks such as sugars and fats that are
used in anabolism.
Anabolism: the process by which simple products and
building blocks of catabolism are used to create
complex biological products that contribute to
organismal growth and development. It also uses the
energy produced in catabolism to do biological work.
,2|Page
Properties of cells - ....ANSWER ....✔✔ Metabolism:
undergoing catabolic and anabolic processes.
Reproduction: cell populations grow via asexual
reproduction.
Mutation: during growth and reproduction, cells
sometimes make mistakes, leading to mutations and
evolution.
Respond to environment: metabolic pathways respond to
signals, including light, touch, hormones, and nutrients,
that can turn the pathways on or off.
Speed and efficiency: cell operations are highly specific
to maximize targeting and efficiency.
Similar building blocks: most species are very similar at
the cellular level.
What accounts for water's unique properties? -
....ANSWER ....✔✔ Hydrogen bonding
,3|Page
The unique properties of water (specific heat, heat of
vaporization, solubility) - ....ANSWER ....✔✔ 1) high
specific heat, or heat required to raise the temperature
of the unit mass of a given substance by one degree.
For water to increase in temperature, water molecules
must be made to move faster, or get higher KE, and
doing this requires breaking hydrogen bonds, which
absorbs heat. So, as heat is applied, most of it goes to
breaking the bonds not upregulating KE, thus making
water harder to heat than substances where no bonds
need to be broken.
2) High heat of vaporization, or the amount of heat
needed to turn one g of a liquid into vapor, without a
temperature rise in the liquid. Important for sweat
because it ensures that when the liquid evaporates from
our skin, the heat required for the transition is kept in the
gas, causing a net cooling effect on the skin.
3) Unique solubility properties: "like dissolves like".
Water dissolves polar molecules and ions, and can act
as an H-bond donor or receptor
4) Amphoteric, it can act as an acid (donating electrons)
or a base (accepting electrons). The conjugate acid of
water is the hydronium ion, H3O+, and the conjugate
base of water is the hydroxide ion, OH-.
, 4|Page
Keq for water at 25 degrees C and in pure water -
....ANSWER ....✔✔ At 25 degrees C:
Keq= Kw= [OH-][H3O+]= 1*10^-14
In pure water:
[OH-]=[H3O+]= 1*10^-7
Calculation for pH and pKa - ....ANSWER ....✔✔ pH=
-log[H3O+]
pKa= -log(Ka)
Normal blood pH range - ....ANSWER ....✔✔ 7.35-
7.45
The Hydrophobic Effect - ....ANSWER ....✔✔ When
non-polar molecules aggregate in the presence of
water, minimizing the entropy decrease water must go
through to order themselves around the border of the
non-polar molecule. Reducing the surface area water
must organize around increases entropy, which is
favorable.
ACS BIOCHEMISTRY EXAM NEWEST ACTUAL
EXAM WITH COMPLETE QUESTIONS AND
CORRECT VERIFIED ANSWERS (DETAILED
ANSWERS) ALREADY GRADED A+ 100%
GUARANTEED TO PASS CONCEPTS!!!
Metabolism (catabolism and anabolism) - ....ANSWER
....✔✔ Metabolism: sum of total chemical reactions in
an organism, also the method by which cells extract and
use energy from their environment.
Catabolism: The process by which stored nutrients and
ingested foods are converted to a usable form of
energy. It produces simple products CO2, H2O, NH3,
and building blocks such as sugars and fats that are
used in anabolism.
Anabolism: the process by which simple products and
building blocks of catabolism are used to create
complex biological products that contribute to
organismal growth and development. It also uses the
energy produced in catabolism to do biological work.
,2|Page
Properties of cells - ....ANSWER ....✔✔ Metabolism:
undergoing catabolic and anabolic processes.
Reproduction: cell populations grow via asexual
reproduction.
Mutation: during growth and reproduction, cells
sometimes make mistakes, leading to mutations and
evolution.
Respond to environment: metabolic pathways respond to
signals, including light, touch, hormones, and nutrients,
that can turn the pathways on or off.
Speed and efficiency: cell operations are highly specific
to maximize targeting and efficiency.
Similar building blocks: most species are very similar at
the cellular level.
What accounts for water's unique properties? -
....ANSWER ....✔✔ Hydrogen bonding
,3|Page
The unique properties of water (specific heat, heat of
vaporization, solubility) - ....ANSWER ....✔✔ 1) high
specific heat, or heat required to raise the temperature
of the unit mass of a given substance by one degree.
For water to increase in temperature, water molecules
must be made to move faster, or get higher KE, and
doing this requires breaking hydrogen bonds, which
absorbs heat. So, as heat is applied, most of it goes to
breaking the bonds not upregulating KE, thus making
water harder to heat than substances where no bonds
need to be broken.
2) High heat of vaporization, or the amount of heat
needed to turn one g of a liquid into vapor, without a
temperature rise in the liquid. Important for sweat
because it ensures that when the liquid evaporates from
our skin, the heat required for the transition is kept in the
gas, causing a net cooling effect on the skin.
3) Unique solubility properties: "like dissolves like".
Water dissolves polar molecules and ions, and can act
as an H-bond donor or receptor
4) Amphoteric, it can act as an acid (donating electrons)
or a base (accepting electrons). The conjugate acid of
water is the hydronium ion, H3O+, and the conjugate
base of water is the hydroxide ion, OH-.
, 4|Page
Keq for water at 25 degrees C and in pure water -
....ANSWER ....✔✔ At 25 degrees C:
Keq= Kw= [OH-][H3O+]= 1*10^-14
In pure water:
[OH-]=[H3O+]= 1*10^-7
Calculation for pH and pKa - ....ANSWER ....✔✔ pH=
-log[H3O+]
pKa= -log(Ka)
Normal blood pH range - ....ANSWER ....✔✔ 7.35-
7.45
The Hydrophobic Effect - ....ANSWER ....✔✔ When
non-polar molecules aggregate in the presence of
water, minimizing the entropy decrease water must go
through to order themselves around the border of the
non-polar molecule. Reducing the surface area water
must organize around increases entropy, which is
favorable.
