Principles of Biochemistry Chapter 1-6
Test Bank by Lehninger 2025\2026
Update.
Which of the following are characteristics of living systems?
A. High degree of complexity and organization
B. Extraction, transformation, and systematic use of energy to create and maintain structures
and to do work
C. Interactions of individual components are dynamic and coordinated
D. A capacity for fairly precise self-replication while allowing enough change for evolution
E. All of the above - Answer E. All of the above
Which of the following structures are components of all living cells?
A. Ribosomes
B. Nuclear membrane
C. Plasma membrane
D. Cytoplasm
E. 1, 3 and 4 - Answer E. 1, 3 and 4
Amino acids are the basic building blocks of proteins and nucleosides are the monomeric units
of nucleic acids. Do you agree?
A. Yes
B. N - Answer A. yes
Which of the following combination of elements make up more than 99% of the mass of most
cells?
A. H, N, O, P
B. H, N, O, C
C. H, C, N, P
, A. ΔG
B. ΔH
C. ΔS
D. ΔE
E. ΔT - Answer B. ΔH
Which is the proper definition of equilibrium, with respect to a biochemical reaction?
A. The forward reaction is favored over the reverse reaction, and it proceeds.
B. There is no net change in reactant and product concentrations.
C. There is a constant rate at which reactant is converted to product.
D. The free-energy change for the reaction is negative. E. The entropy of the reaction is negative
and the enthalpy of the reaction is positive. - Answer
For the reaction below A + B <-> C If you add a catalyst to this reaction you will have more C at
equilibrium True or False? - Answer False
Which of the following is a reflection of the total energy change in a chemical reaction, a
measure of the number and kinds of bonds that are made and broken?
A. ΔG
B. ΔH
C. ΔS
D. ΔE
E. ΔT - Answer B. ΔH
Which of the following atoms does not commonly form hydrogen bonds between or within
biological molecules?
A. Oxygen
B. Hydrogen
C. Carbon
Test Bank by Lehninger 2025\2026
Update.
Which of the following are characteristics of living systems?
A. High degree of complexity and organization
B. Extraction, transformation, and systematic use of energy to create and maintain structures
and to do work
C. Interactions of individual components are dynamic and coordinated
D. A capacity for fairly precise self-replication while allowing enough change for evolution
E. All of the above - Answer E. All of the above
Which of the following structures are components of all living cells?
A. Ribosomes
B. Nuclear membrane
C. Plasma membrane
D. Cytoplasm
E. 1, 3 and 4 - Answer E. 1, 3 and 4
Amino acids are the basic building blocks of proteins and nucleosides are the monomeric units
of nucleic acids. Do you agree?
A. Yes
B. N - Answer A. yes
Which of the following combination of elements make up more than 99% of the mass of most
cells?
A. H, N, O, P
B. H, N, O, C
C. H, C, N, P
, A. ΔG
B. ΔH
C. ΔS
D. ΔE
E. ΔT - Answer B. ΔH
Which is the proper definition of equilibrium, with respect to a biochemical reaction?
A. The forward reaction is favored over the reverse reaction, and it proceeds.
B. There is no net change in reactant and product concentrations.
C. There is a constant rate at which reactant is converted to product.
D. The free-energy change for the reaction is negative. E. The entropy of the reaction is negative
and the enthalpy of the reaction is positive. - Answer
For the reaction below A + B <-> C If you add a catalyst to this reaction you will have more C at
equilibrium True or False? - Answer False
Which of the following is a reflection of the total energy change in a chemical reaction, a
measure of the number and kinds of bonds that are made and broken?
A. ΔG
B. ΔH
C. ΔS
D. ΔE
E. ΔT - Answer B. ΔH
Which of the following atoms does not commonly form hydrogen bonds between or within
biological molecules?
A. Oxygen
B. Hydrogen
C. Carbon
