Lehninger Principles of Biochemistry 7th Edition Test Bank (2026) | Nelson & Cox | Complete Q&A with Rationales | Latest 2024 Update

TESTBANK
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,Chapter 1. The Foundations of Biochemistry (Answers
b b b b b b




are at the End of Each Chapter)
b b b b b b b




1. In a bacterial cell, the DNA is in the:
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A) cell envelope. b




B) cell membrane. b




C) nucleoid.
D) nucleus.
E) ribosomes.


2. A major change occurring in the evolution of eukaryotes from prokaryotes was the
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development of:
b b




A) DNA.
B) photosynthetic capability. b




C) plasma membranes. b




D) ribosomes.
E) the nucleus. b




3. In eukaryotes, the nucleus is enclosed by a double membrane called the:
b b b b b b b b b b b




A) cell membrane. b




B) nuclear envelope. b




C) nucleolus.
D) nucleoplasm.
E) nucleosome.


4. The dimensions of living cells are limited, on the lower end by the minimum number of
b b b b b b b b b b b b b b b




biomolecules necessary for function, and on the upper end by the rate of diffusion of solutes
b b b b b b b b b b b b b b b b




such as oxygen. Except forhighly elongated cells, they usually have lengths and diameters in
b b b b b b b b b b b b b b b




the range of:
b b b




A) 0.1 m to 10 m. b b b b




B) 0.3 m to 30 m. b b b b




C) 0.3 m to 100 m. b b b b




D) 1 m to 100 m. b b b b




E) 1 m to 300 m. b b b b




5. Which group ofsingle-celled microorganisms has many members found growing in
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extreme environments?
b b




A) bacteria
B) archaea
C) eukaryotes
D) heterotrophs
E) None of the answers is correct. b b b b b




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, 6. The bacterium E. coli requires simple organic molecules for growth and energy—it is
b b b b b b b b b b b b




therefore a:
b b




A) chemoautotroph.
B) chemoheterotroph.
C) lithotroph.
D) photoautotroph.
E) photoheterotroph.


7. Which is a list of organelles?
b b b b b




A) mitochondria, chromatin, endoplasmic reticulum b b b




B) peroxisomes, lysosomes, plasma membrane b b b




C) proteasomes, peroxisomes, lysosomes b b




D) mitochondria, endoplasmic reticulum, peroxisomes b b b




E) All ofthe answers are correct.
b b b b b




8. Which list has the cellular components arranged in order of INCREASING size?
b b b b b b b b b b b




A) amino acid < protein < mitochondrion < ribosome
b b b b b b b




B) amino acid <protein < ribosome < mitochondrion
b b b b b b b




C) amino acid < ribosome < protein < mitochondrion
b b b b b b b




D) protein < amino acid < mitochondrion < ribosome
b b b b b b b




E) protein < ribosome < mitochondrion < amino acid
b b b b b b b




9. Thethree-dimensional structureofmacromolecules is formed and maintained primarily
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through noncovalent interactions. Which one of the following is NOT considered a
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noncovalent interaction?
b b




A) carbon-carbon bonds b




B) hydrogen bonds b




C) hydrophobic interactions b




D) ionic interactions b




E) van der Waals interactions
b b b




10. Which element is NOT among the four most abundant in living organisms?
b b b b b b b b b b b




A) carbon
B) hydrogen
C) nitrogen
D) oxygen
E) phosphorus




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, 11. The four covalent bonds in methane (CH4)are arranged around carbon to give which
b b b b b b b b b b b b b




geometry?
b




A) linear
B) tetrahedral
C) trigonal bipyramidal b




D) trigonal planar b




E) trigonal pyramidal b




12. What functional groups are present on this molecule?
b b b b b b b




A) ether and aldehyde
b b




B) hydroxyl and aldehyde b b




C) hydroxyland carboxylic acid b b b




D) hydroxyl and ester b b




E) hydroxyl and ketone b b




13. Themacromolecules that serve in thestorage and transmission ofgenetic information are:
b b b b b b b b b b b b




A) carbohydrates.
B) lipids.
C) membranes.
D) nucleic acids. b




E) proteins.


14. Stereoisomers that are nonsuperimposable mirror images of each other are known as:
b b b b b b b b b b b




A) anomers.
B) cis-trans isomers. b




C) diastereoisomers.
D) enantiomers.
E) geometric isomers. b




15. The catalog of all proteins functioning in a cell is the:
b b b b b b b b b b




A) metabolome.
B) proteasome.
C) lysosome.
D) proteome.
E) genome.




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