Test Bank for Lehninger Principles of Biochemistry
7th Edition by Nelson (complete,
questions/answers/rationales) | Lehninger
Principles of Biochemistry 7th Edition Nelson Test
Bank
1. The most precise modern definition of a gene is a segment of genetic material that:
A) codes for one polypeptide.
B) codes for one polypeptide or RNA product.
C) determines one phenotype.
D) determines one trait.
E) that codes for one protein. --- B. codes for one polypeptide or RNA product
\a2. The DNA in a bacterial (prokaryotic) chromosome is best described as:
A) a single circular double-helical molecule.
B) a single linear double-helical molecule.
C) a single linear single-stranded molecule.
D) multiple linear double-helical molecules.
E) multiple linear single-stranded molecules --- A. a single circular double-helical molecule
\a3. Bacterial plasmids:
A) are always covalently joined to the bacterial chromosome.
B) are composed of RNA.
C) are never circular.
D) cannot replicate when cells divide.
, E) often encode proteins not normally essential to the bacterium's survival. --- E. often encode
proteins not normally essential to the bacterium's survival
\a4. Which of these statements about nucleic acids is false?
A) Mitochondria and chloroplasts contain DNA.
B) Plasmids are genes that encode plasma proteins in mammals.
C) The chromosome of E. coli is a closed-circular, double-helical DNA.
D) The DNA of viruses is usually much longer than the viral particle itself.
E) The genome of many plant viruses is RNA. --- B. plasmids are genes that encode plasma proteins
in mammals
\a5. Functional DNA is not found in:
A) bacterial nucleoids.
B) chloroplasts.
C) lysosomes.
D) mitochondria.
E) nuclei. --- C. lysosomes
\a6. The DNA in a eukaryotic chromosome is best described as:
A) a single circular double-helical molecule.
B) a single linear double-helical molecule.
C) a single linear single-stranded molecule.
D) multiple linear double-helical molecules.
E) multiple linear single-stranded molecules --- B. a single linear double-helical molecule
\a7. Introns:
A) are frequently present in prokaryotic genes but are rare in eukaryotic genes.
B) are spliced out before transcription.
7th Edition by Nelson (complete,
questions/answers/rationales) | Lehninger
Principles of Biochemistry 7th Edition Nelson Test
Bank
1. The most precise modern definition of a gene is a segment of genetic material that:
A) codes for one polypeptide.
B) codes for one polypeptide or RNA product.
C) determines one phenotype.
D) determines one trait.
E) that codes for one protein. --- B. codes for one polypeptide or RNA product
\a2. The DNA in a bacterial (prokaryotic) chromosome is best described as:
A) a single circular double-helical molecule.
B) a single linear double-helical molecule.
C) a single linear single-stranded molecule.
D) multiple linear double-helical molecules.
E) multiple linear single-stranded molecules --- A. a single circular double-helical molecule
\a3. Bacterial plasmids:
A) are always covalently joined to the bacterial chromosome.
B) are composed of RNA.
C) are never circular.
D) cannot replicate when cells divide.
, E) often encode proteins not normally essential to the bacterium's survival. --- E. often encode
proteins not normally essential to the bacterium's survival
\a4. Which of these statements about nucleic acids is false?
A) Mitochondria and chloroplasts contain DNA.
B) Plasmids are genes that encode plasma proteins in mammals.
C) The chromosome of E. coli is a closed-circular, double-helical DNA.
D) The DNA of viruses is usually much longer than the viral particle itself.
E) The genome of many plant viruses is RNA. --- B. plasmids are genes that encode plasma proteins
in mammals
\a5. Functional DNA is not found in:
A) bacterial nucleoids.
B) chloroplasts.
C) lysosomes.
D) mitochondria.
E) nuclei. --- C. lysosomes
\a6. The DNA in a eukaryotic chromosome is best described as:
A) a single circular double-helical molecule.
B) a single linear double-helical molecule.
C) a single linear single-stranded molecule.
D) multiple linear double-helical molecules.
E) multiple linear single-stranded molecules --- B. a single linear double-helical molecule
\a7. Introns:
A) are frequently present in prokaryotic genes but are rare in eukaryotic genes.
B) are spliced out before transcription.
