Biol 243 Online Quiz Questions With
Verified Answers
Using Chargaff's rules, you can determine that the DNA of an organism that
contains
10% cytosine would contain ____________adenine.
A) 20%
B) 30%
C) 40%
D) 60%
E) 70% - ANSWER c
If protease treatment in Avery et al.'s experiment only prevented the
transformation of
bacteria, what would have been the conclusion of these researchers?
A) RNA is the genetic/hereditary material.
B) DNA is the genetic/hereditary material.
C) Proteins are the genetic/hereditary materials.
D) Proteins and RNA are the genetic/hereditary materials.
E) Proteins and DNA are the genetic/hereditary materials. - ANSWER c
In the DNA sequence 5'-TGAC-3', the phosphodiester linkage between the
guanine and
the adenine connect:
A) the 3' end of the guanine to the 5' end of the adenine.
B) the 5' end of the guanine to the 1' end of the adenine.
C) the 3' end of the adenine to the 5' end of the guanine.
D) the 5' end of the guanine to the 2' end of the adenine.
E) the 2' end of the adenine to the 3' end of the guanine. - ANSWER a
The two strands of the DNA can be denatured or separated by breaking the
A) Peptide bonds
B) Ionic bonds
C) Hydrogen bonds
D) Phosphodiester bonds
E) Metallic bonds - ANSWER c
Which of the following is NOT part of the Watson-Crick model of the structure of
DNA?
A) Base pairing occurs in the interior of the DNA molecule which is hydrophobic
B) Purines bind to pyrimidines
,C) Complementary base pairing allows DNA to form a long polymer
D) The two DNA strands have antiparallel orientation
E) DNA forms a double helix - ANSWER c
DNA is wrapped around histones, which contain many copies of the positive
amino acids
lysine and arginine. These positive amino acids neutralize the negative charge
of the
______________ of the DNA wrapped around the histone.
A) ribose sugar
B) hydroxyl group
C) nitrogenous base
D) phosphate group
E) All of the answer options are correct. - ANSWER d
Arrange the following genetic terms in order from smallest to largest.
A) Genome, gene, nucleotide, nucleoside
B) Gene, nucleotide, genome, nucleoside
C) Nucleoside, nucleotide, gene, genome
D) Nucleotide, nucleoside, gene, genome
E) Nucleoside, nucleotide, genome, gene - ANSWER c
Which one of the following is not true of genes?
A) Are made of deoxyribonucleotides
B) Part of the genome that produces RNA molecules
C) Only codes for proteins
D) Are found on chromosomes and plasmids in prokaryotes
E) Functional unit of hereditary - ANSWER c
Which type of molecule is adenosine?
A) Nitrogenous base
B) Deoxyribonucleotide
C) Ribonucleotide
D) Ribonucleoside
E) Purine - ANSWER d
Integrase is an enzyme that functions to insert the viral genome into the host
chromosome. The most likely outcome as a result of treating bacteriophages
with an
integrase inhibitor is:
A) Higher rate of infection
B) Increased circularization of viral DNA
C) Lower rate of lysogeny
D) Elimination of the lytic cycle
E) Higher content of viral DNA in the host genome - ANSWER c
, The distinct phenotypes exhibited between two siblings are due to different:
A) Alleles
B) Gene Expression
C) Genotypes
D) Genomes
E) All of the above - ANSWER e
When a mixture of debris from killed virulent bacteria and living non-virulent
bacteria
are injected into mice:
A) The mice survive because the virulent bacteria are killed.
B) The mice survive because none of the living bacteria are virulent.
C) The mice survive because the virulent bacteria are transformed into non-
virulent bacteria.
D) The mice are killed because the non-virulent bacteria are transformed into
virulent
bacteria
E) The mice are killed because the virulent bacteria are revived. - ANSWER d
Analysis of the genome of a new algal cell reveals a tetraploid genome
containing a total
number of 28 chromosomes. The number of unique chromosomes in this
organism is
A) 56
B) 28
C) 14
D) 7
E) 4 - ANSWER d
. Which one of these is not part of a chromosome?
A) Uracil
B) Nucleosome
C) Deoxyribonucleic acid
D) Histone
E) Phosphate - ANSWER a
The genome of a prokaryote consists of a:
A) Double-stranded circular DNA molecule
B) Single-stranded circular DNA molecule
C) Double-stranded circular RNA molecule
D) Single-stranded linear RNA molecule
E) Double-stranded linear DNA molecule - ANSWER a
In gene expression, the process of transcription involves the:
A) Synthesis of transfer RNA from a gene
B) Synthesis of eukaryotic ribosomal RNA from a gene
Verified Answers
Using Chargaff's rules, you can determine that the DNA of an organism that
contains
10% cytosine would contain ____________adenine.
A) 20%
B) 30%
C) 40%
D) 60%
E) 70% - ANSWER c
If protease treatment in Avery et al.'s experiment only prevented the
transformation of
bacteria, what would have been the conclusion of these researchers?
A) RNA is the genetic/hereditary material.
B) DNA is the genetic/hereditary material.
C) Proteins are the genetic/hereditary materials.
D) Proteins and RNA are the genetic/hereditary materials.
E) Proteins and DNA are the genetic/hereditary materials. - ANSWER c
In the DNA sequence 5'-TGAC-3', the phosphodiester linkage between the
guanine and
the adenine connect:
A) the 3' end of the guanine to the 5' end of the adenine.
B) the 5' end of the guanine to the 1' end of the adenine.
C) the 3' end of the adenine to the 5' end of the guanine.
D) the 5' end of the guanine to the 2' end of the adenine.
E) the 2' end of the adenine to the 3' end of the guanine. - ANSWER a
The two strands of the DNA can be denatured or separated by breaking the
A) Peptide bonds
B) Ionic bonds
C) Hydrogen bonds
D) Phosphodiester bonds
E) Metallic bonds - ANSWER c
Which of the following is NOT part of the Watson-Crick model of the structure of
DNA?
A) Base pairing occurs in the interior of the DNA molecule which is hydrophobic
B) Purines bind to pyrimidines
,C) Complementary base pairing allows DNA to form a long polymer
D) The two DNA strands have antiparallel orientation
E) DNA forms a double helix - ANSWER c
DNA is wrapped around histones, which contain many copies of the positive
amino acids
lysine and arginine. These positive amino acids neutralize the negative charge
of the
______________ of the DNA wrapped around the histone.
A) ribose sugar
B) hydroxyl group
C) nitrogenous base
D) phosphate group
E) All of the answer options are correct. - ANSWER d
Arrange the following genetic terms in order from smallest to largest.
A) Genome, gene, nucleotide, nucleoside
B) Gene, nucleotide, genome, nucleoside
C) Nucleoside, nucleotide, gene, genome
D) Nucleotide, nucleoside, gene, genome
E) Nucleoside, nucleotide, genome, gene - ANSWER c
Which one of the following is not true of genes?
A) Are made of deoxyribonucleotides
B) Part of the genome that produces RNA molecules
C) Only codes for proteins
D) Are found on chromosomes and plasmids in prokaryotes
E) Functional unit of hereditary - ANSWER c
Which type of molecule is adenosine?
A) Nitrogenous base
B) Deoxyribonucleotide
C) Ribonucleotide
D) Ribonucleoside
E) Purine - ANSWER d
Integrase is an enzyme that functions to insert the viral genome into the host
chromosome. The most likely outcome as a result of treating bacteriophages
with an
integrase inhibitor is:
A) Higher rate of infection
B) Increased circularization of viral DNA
C) Lower rate of lysogeny
D) Elimination of the lytic cycle
E) Higher content of viral DNA in the host genome - ANSWER c
, The distinct phenotypes exhibited between two siblings are due to different:
A) Alleles
B) Gene Expression
C) Genotypes
D) Genomes
E) All of the above - ANSWER e
When a mixture of debris from killed virulent bacteria and living non-virulent
bacteria
are injected into mice:
A) The mice survive because the virulent bacteria are killed.
B) The mice survive because none of the living bacteria are virulent.
C) The mice survive because the virulent bacteria are transformed into non-
virulent bacteria.
D) The mice are killed because the non-virulent bacteria are transformed into
virulent
bacteria
E) The mice are killed because the virulent bacteria are revived. - ANSWER d
Analysis of the genome of a new algal cell reveals a tetraploid genome
containing a total
number of 28 chromosomes. The number of unique chromosomes in this
organism is
A) 56
B) 28
C) 14
D) 7
E) 4 - ANSWER d
. Which one of these is not part of a chromosome?
A) Uracil
B) Nucleosome
C) Deoxyribonucleic acid
D) Histone
E) Phosphate - ANSWER a
The genome of a prokaryote consists of a:
A) Double-stranded circular DNA molecule
B) Single-stranded circular DNA molecule
C) Double-stranded circular RNA molecule
D) Single-stranded linear RNA molecule
E) Double-stranded linear DNA molecule - ANSWER a
In gene expression, the process of transcription involves the:
A) Synthesis of transfer RNA from a gene
B) Synthesis of eukaryotic ribosomal RNA from a gene
