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Complete Test Bank Brock Biology of Microorganisms 16th Edition Madigan Question2
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Complete Test Bank Brock Biology of Microorganisms 16th Edition Madigan Question2
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Complete Test Bank Brock Biology of Microorganisms16th Edition Madigan Questions & Answers
1) ________ of prokaryotic genomes are now available in public databases.
A) Dozens
B) Hundreds
C) Thousands
D) Millions - ANSWER C) Thousands
2) When comparing genes from Archaea, Bacteria, and Eukarya, which statement is
TRUE?
A) Almost all archaeal genes are more similar to eukaryotic genes than to bacterial
genes.
B) Almost all archaeal genes are more similar to bacterial genes than to eukaryotic
genes.
C) Genes in Archaea involved in DNA replication, transcription, and translation are
more similar to those of Eukarya, while those encoding metabolic functions other
than information processing are more similar to those of Bacteria.
D) Archaeal genes are almost universally unique; very few are similar to either
eukaryotic or bacterial genes. - ANSWER C) Genes in Archaea involved in DNA
replication, transcription, and translation are more similar to those of Eukarya, while
those encoding metabolic functions other than information processing are more
similar to those of Bacteria.
3) 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) Homo sapiens > Arabidopsis thaliana > Plasmodium falciparum >
Cryptosporidium parvum
4) 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) chloroplast.
5) 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) rRNA genes most
closely related to Bacteria
6) An open reading frame (ORF) encodes for
A) a carbohydrate.
B) a polypeptide.
C) mRNA.
D) a carbohydrate or a polypeptide. - ANSWER B) a polypeptide.
7) 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)
present in one or more strains of the same species.
8) 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) detect pathogens, analyze global gene
expression, and detect unwanted food additives or substitutes.
9) 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) it analyzes RNA, thus it reveals which genes
are expressed under different conditions.
10) The most abundant genes in prokaryotic genomes are
A) those involved in metabolism.
B) those involved in translation.
C) those involved in transport.
D) those involved in DNA replication. - ANSWER A) those involved in metabolism.
11) When compared with Bacteria, species of Archaea seem to devote a higher
percentage of their genomes to genes encoding proteins involved in
A) transcription.
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