BIOCHEMISTRY COMPREHENSIVE TEST
BANK 2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◉Living systems are:
a. closed systems exchanging only energy with the surroundings.
b. isolated systems that are totally contained.
c. open systems exchanging only energy with the surroundings.
d. open systems exchanging both energy and matter with their
surroundings.
e. none of the above. ANSWER:-open systems exchanging both energy
and matter with their surroundings.
◉Which statement pertaining to the three basic systems is true?
a. The internal energy of an isolated system is mostly conserved.
,b. Open systems can exchange matter with other open systems.
c. Open systems can exchange matter with a closed system.
d. The internal energy of an open system is always constant.
e. A closed system can accept heat from an isolated system. ANSWER:-
Open systems can exchange matter with other open systems.
◉Enthalpy change, ΔH, is:
a. the sum of heat absorbed and work.
b. not a thermodynamic state function.
c. a measure of disorder in a system.
d. determined by pressure change at a constant temperature.
e. equal to the heat transferred at constant pressure and volume.
ANSWER:-equal to the heat transferred at constant pressure and
volume.
◉An example of an open system would be:
, a. a chemical reaction taking place in a closed beaker.
b. a steam radiator.
c. an insulated bomb reactor.
d. a pot of boiling water.
e. contents of a calorimeter. ANSWER:-a pot of boiling water.
◉Which of the following statements is true for the Second Law of
Thermodynamics?
a. Systems tend to proceed from disordered states to ordered states.
b. The entropy of the system plus its surroundings is unchanged by
reversible processes
c. The entropy of the system plus its surroundings decreases for
irreversible processes.
d. Naturally occurring processes never proceed toward equilibrium
.
e. All of the above are true ANSWER:-The entropy of the system plus
its surroundings is unchanged by reversible processes
◉Entropy change, ΔS, is
BANK 2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◉Living systems are:
a. closed systems exchanging only energy with the surroundings.
b. isolated systems that are totally contained.
c. open systems exchanging only energy with the surroundings.
d. open systems exchanging both energy and matter with their
surroundings.
e. none of the above. ANSWER:-open systems exchanging both energy
and matter with their surroundings.
◉Which statement pertaining to the three basic systems is true?
a. The internal energy of an isolated system is mostly conserved.
,b. Open systems can exchange matter with other open systems.
c. Open systems can exchange matter with a closed system.
d. The internal energy of an open system is always constant.
e. A closed system can accept heat from an isolated system. ANSWER:-
Open systems can exchange matter with other open systems.
◉Enthalpy change, ΔH, is:
a. the sum of heat absorbed and work.
b. not a thermodynamic state function.
c. a measure of disorder in a system.
d. determined by pressure change at a constant temperature.
e. equal to the heat transferred at constant pressure and volume.
ANSWER:-equal to the heat transferred at constant pressure and
volume.
◉An example of an open system would be:
, a. a chemical reaction taking place in a closed beaker.
b. a steam radiator.
c. an insulated bomb reactor.
d. a pot of boiling water.
e. contents of a calorimeter. ANSWER:-a pot of boiling water.
◉Which of the following statements is true for the Second Law of
Thermodynamics?
a. Systems tend to proceed from disordered states to ordered states.
b. The entropy of the system plus its surroundings is unchanged by
reversible processes
c. The entropy of the system plus its surroundings decreases for
irreversible processes.
d. Naturally occurring processes never proceed toward equilibrium
.
e. All of the above are true ANSWER:-The entropy of the system plus
its surroundings is unchanged by reversible processes
◉Entropy change, ΔS, is
