BIOCHEMISTRY LATEST REVISION
QUESTIONS AND ANSWERS
In a bacterial cell, the DNA is in the:
A) cell envelope.
B) cell membrane.
C) nucleoid.
D) nucleus.
E) ribosomes.
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.
E) 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.
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.
D) 1 µm to 100 µm.
E) 1 µm to 300 µm.
C) 0.3 µm to 100 µm.
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.
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
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
A) carbon-carbon bonds
Which one of the following is not among the four most
abundant elements in living organisms?
A) Carbon
B) Hydrogen
C) Nitrogen
D) Oxygen
E) Phosphorus
E) Phosphorus
QUESTIONS AND ANSWERS
In a bacterial cell, the DNA is in the:
A) cell envelope.
B) cell membrane.
C) nucleoid.
D) nucleus.
E) ribosomes.
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.
E) 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.
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.
D) 1 µm to 100 µm.
E) 1 µm to 300 µm.
C) 0.3 µm to 100 µm.
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.
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
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
A) carbon-carbon bonds
Which one of the following is not among the four most
abundant elements in living organisms?
A) Carbon
B) Hydrogen
C) Nitrogen
D) Oxygen
E) Phosphorus
E) Phosphorus
