Biochemistry Chapter 1 Test Bank by
Lehninger 2025\2026 Edition.
In a bacterial cell, the DNA is in the:
A) cell envelope.
B) cell membrane.
C) nucleoid.
D) nucleus.
E) ribosomes. - Answer C - Nucleoid
A major change occurring in the evolution of eukaryotes from prokaryotes was the
development of:
A) DNA.
B) photosynthetic capability.
C) plasma membranes.
D) ribosomes.
E) the nucleus. - Answer The Nucleus
In eukaryotes, the nucleus is enclosed by a double membrane called the:
A) cell membrane.
B) nuclear envelope.
C) nucleolus.
D) nucleoplasm.
E) nucleosome. - Answer B - Nuclear envelope
The dimensions of living cells are limited, on the lower end by the minimum number of
biomolecules necessary for function, and on the upper end by the rate of diffusion of solutes
such as oxygen. Except for highly elongated cells, they usually have lengths and diameters in the
range of:
A) 0.1 μm to 10 μm.
B) 0.3 μm to 30 μm.
C) 0.3 μm to 100 μm.
, Which group of single-celled micro-organisms has many members found growing in extreme
environments?
A) bacteria.
B) archaea.
C) eukaryotes.
D) heterotrophs.
E) none of the above. - Answer B) archaea.
The bacterium E. coli requires simple organic molecules for growth and energy—it is therefore
a:
A) chemoautotroph.
B) chemoheterotroph.
C) lithotroph.
D) photoautotroph.
E) photoheterotroph. - Answer B) chemoheterotroph.
Which one of the following has the cellular components arranged in order of increasing size?
A) Amino acid < protein < mitochondrion < ribosome
B) Amino acid < protein < ribosome < mitochondrion
C) Amino acid < ribosome < protein < mitochondrion
D) Protein < amino acid < mitochondrion < ribosome
E) Protein < ribosome < mitochondrion < amino acid - Answer B) Amino acid < protein <
ribosome < mitochondrion
The three-dimensional structure of macromolecules is formed and maintained primarily
through noncovalent interactions. Which one of the following is not considered a noncovalent
interaction?
A) carbon-carbon bonds
B) hydrogen bonds
C) hydrophobic interactions
D) ionic interactions
E) van der Waals interactions - Answer A) carbon-carbon bonds
Lehninger 2025\2026 Edition.
In a bacterial cell, the DNA is in the:
A) cell envelope.
B) cell membrane.
C) nucleoid.
D) nucleus.
E) ribosomes. - Answer C - Nucleoid
A major change occurring in the evolution of eukaryotes from prokaryotes was the
development of:
A) DNA.
B) photosynthetic capability.
C) plasma membranes.
D) ribosomes.
E) the nucleus. - Answer The Nucleus
In eukaryotes, the nucleus is enclosed by a double membrane called the:
A) cell membrane.
B) nuclear envelope.
C) nucleolus.
D) nucleoplasm.
E) nucleosome. - Answer B - Nuclear envelope
The dimensions of living cells are limited, on the lower end by the minimum number of
biomolecules necessary for function, and on the upper end by the rate of diffusion of solutes
such as oxygen. Except for highly elongated cells, they usually have lengths and diameters in the
range of:
A) 0.1 μm to 10 μm.
B) 0.3 μm to 30 μm.
C) 0.3 μm to 100 μm.
, Which group of single-celled micro-organisms has many members found growing in extreme
environments?
A) bacteria.
B) archaea.
C) eukaryotes.
D) heterotrophs.
E) none of the above. - Answer B) archaea.
The bacterium E. coli requires simple organic molecules for growth and energy—it is therefore
a:
A) chemoautotroph.
B) chemoheterotroph.
C) lithotroph.
D) photoautotroph.
E) photoheterotroph. - Answer B) chemoheterotroph.
Which one of the following has the cellular components arranged in order of increasing size?
A) Amino acid < protein < mitochondrion < ribosome
B) Amino acid < protein < ribosome < mitochondrion
C) Amino acid < ribosome < protein < mitochondrion
D) Protein < amino acid < mitochondrion < ribosome
E) Protein < ribosome < mitochondrion < amino acid - Answer B) Amino acid < protein <
ribosome < mitochondrion
The three-dimensional structure of macromolecules is formed and maintained primarily
through noncovalent interactions. Which one of the following is not considered a noncovalent
interaction?
A) carbon-carbon bonds
B) hydrogen bonds
C) hydrophobic interactions
D) ionic interactions
E) van der Waals interactions - Answer A) carbon-carbon bonds
