Biology (Mader), 10th Edition

Chapter 12: Molecular Biology of the Gene

Post-Test

1
Chromosomes contain _____.
A)proteins
B)enzymes
C)polysaccharides
D)phospholipids
2
Nucleic acids can be distinguished from proteins by _____.
A)the presence of phosphorous in nucleic acids
B)the presence of sulfur in nucleic acids
C)All of these
3
Nucleic acids contain _____ type(s) of nucleotide(s).
A)one
B)two
C)three
D)four
4
The ability of the genetic material to _____ provides the genetic variability required for evolution to occur.
A)store information
B)be replicated
C)undergo changes
D)All of these
5
Okazaki fragments are characteristic of the DNA replication of the _____ strand.
A)leading
B)lagging
C)RNA
6
The 3' end of each Okazaki fragment is joined to the 5' end of the next fragment by _____.
A)DNA repair enzymes
B)RNA polymerase
C)helicase
D)DNA ligase
7
The V shape wherever DNA is being replicated in a eukaryotic cell is referred to as a _____.
A)chiasmata
B)replication fork
C)gene locus
D)cleavage furrow
8
Chemotherapeutic drugs stop DNA replication because the drugs are analogs to _____.
A)one of the four nucleotides
B)DNA polymerase
C)deoxyribose
D)helicase
9
New complementary nucleotides are positioned and joined by _____ during replication.
A)DNA polymerase
B)helicase
C)sucrase
D)RNA polymerase
10
DNA replication takes place _____.
A)during interphase
B)prior to mitosis
C)prior to meiosis
D)All of these
11
In _____ replication can occur in two directions at once because the DNA molecule is circular.
A)prokaryotes
B)eukaryotes
C)viruses
12
The rungs of ladder (DNA) are the _____.
A)deoxyribose sugars
B)phosphate groups
C)hydrogen-bonded bases
13
If a segment of DNA contains 430 nucleotides and 120 of the nucleotides are guanine, there will be _____ cytosine nucleotides.
A)120
B)190
C)95
D)None of these
14
In Griffith's experiment _____.
A)S strain bacteria killed the mice
B)R strain bacteria killed the mice
C)heat-killed S strain bacteria killed the mice
D)a mixture of heat-killed S strain bacteria and R strain bacteria failed to kill the mice
15
Bacteriophages are _____.
A)mutant bacterial cells
B)pathogenic bacteria
C)viruses that attack bacteria
D)bacteria that attack the cells of humans' intestines
16
DNA replication is best described as _____.
A)completely conservative
B)semiconservative
C)a very slow process
D)error-free
17
Which of these is NOT found as part of complete RNA molecule?
A)Intron
B)Cap
C)Exon
D)Poly-A tail
18
Which of the following statements is false?
A)There are more codons than amino acids, so the genetic code has redundancies.
B)Some codons are used for termination or initiation of a gene.
C)All codons code for a specific amino acid.
D)There are sixty-four different codons.
19
A promoter is defined as _______.
A)an enzyme which turns on a gene to transcribe an RNA molecule
B)the active portion of an RNA molecule
C)the site where RNA polymerase will bind
D)All of these
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