ACS Biochemistry Exam
LATEST VERSION 2023-
2024 ACTUAL EXAM
QUESTIONS AND CORRECT
DETAILED ANSWERS WITH
RATIONALES |ALREADY
GRADED A+
Metabolism (catabolism and
anabolism) - ANSWERMetabolism:
Rationale.
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.
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.
Rationale.
The aggregation is responsible
for the formation of a variety of
lipid structures in the body,
including cell membranes.
Normal blood pH range -
ANSWER-7.35-7.45
Properties of cells - ANSWERMetabolism: undergoing
catabolic and anabolic
processes.
Rationale.
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.
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