2026/2027 Test Bank for Brock Biology of Microorganisms 15th Edition Chapter 9

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Biology of Microorganisms, 15e (Madigan et al.) Ch




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Biology of Microorganisms, 15e (Madigan et al.) Chap




Brock Biology of Microorganisms, 15e (Madigan et al.)
Chapter 9 Microbial Systems Biology

9.1 Multiple Choice Questions

1) of prokaryotic genomes are now available in public databases.
A) Dozens
B) Hundreds
C) Thousands
D) Millions
Answer: C
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 9.1

2) Based on the table of average intron frequency given below, predict the relative order of
genome size for these four eukaryotic organisms.

Organism Average Intron Frequency
Cryptosporidium parvum 0
Plasmodium falciparum 1
Arabidopsis thaliana 5
Homo sapiens 8

A) Homo sapiens > Arabidopsis thaliana > Plasmodium falciparum > Cryptosporidium parvum
B) Cryptosporidium parvum > Plasmodium falciparum > Arabidopsis thaliana > Homo sapiens
C) Homo sapiens > Cryptosporidium parvum > Plasmodium falciparum > Arabidopsis thaliana
D) Intron frequency cannot be used to predict genome size in eukaryotes.
Answer: A
Bloom’s Taxonomy: 3-4: Applying/Analyzing
Chapter Section: 9.6

3) The 140 kbp genome containing many short repeats, ribosomal RNA genes, one RNA
polymerase gene (rpo) and one RubisCO gene (rbcL) is most likely from a(n)
A) plant.
B) autotrophic bacterium.
C) chloroplast.
D) autotrophic archaeon.
Answer: C
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 9.4




1
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Biology of Microorganisms, 15e (Madigan et al.) Chap




4) The evolutionary origin of mitochondria is demonstrated by which of the following key
genomic characteristics?
A) variable numbers of protein-encoding genes
B) large stretches of AT-rich DNA
C) linear and circular genome structure in different organisms
D) rRNA genes most closely related to Bacteria
Answer: D
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 9.4

5) An open reading frame (ORF) encodes for
A) a carbohydrate.
B) a polypeptide.
C) a lipid.
D) a carbohydrate or a polypeptide.
Answer: B
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 9.2

6) The pan genome of a species is the genomic content that is
A) common to all strains of the same species.
B) present in one or more strains of the same species.
C) shared with all other prokaryotes.
D) hypothetical or uncharacterized genome content of a species.
Answer: B
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 9.7

7) Microarrays can be used to
A) analyze global gene expression.
B) detect pathogens.
C) detect unwanted food additives or substitutes.
D) detect pathogens, analyze global gene expression, and detect unwanted food additives or
substitutes.
Answer: D
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 9.9

8) Transcriptome analysis is useful in relation to genome analysis because
A) it is NOT dependent on nucleic acid sequencing technology.
B) it results in amino acid sequence and is, thus, easier to analyze.
C) it analyzes RNA, thus it reveals which genes are expressed under different conditions.
D) it reveals interactions between molecules and, thus, provides more information than genome
analysis.
Answer: C
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 9.9
2
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