C HAPTER 10: V IRAL G ENOMICS ,
D IVERSITY , AND E COLOGY
Test Bank for Brock Biology of Microorganism 16th Edition by Michael T.
Madigan
10.1 Multiple Choice Questions
1. Which t ype of viruses generall y has the smallest genome?
A) bacteriophages
B) DNA viruses
C) RNA viruses
D) viroids
2. The Baltimore Scheme to classify viruses contains a total of ______
groups based on _______.
A) four / genome composition
B) four / genome composition and transcription mechanism
C) seven / genome composition
D) seven / genome composition and tra nscription mechanism
3. Earl y and late viral proteins are classified according to their relative
A) evolutionary appearance in virus genomes.
B) stabilit y during infection.
C) time of synthesis following host infection.
D) transmission into virions.
4. Which t ype of viruses can be directl y used for translation?
A) dsRNA
, B) negative ssRNA
C) positive ssRNA
D) retroviruses
5. If the hypothesis stating viruses evolved prior to living organisms on
Earth is TRUE, the first t ype of viruses in the world were likel y
A) bacteriophages.
B) DNA viruses.
C) retroviruses.
D) RNA viruses.
6. The filamentous DNA phages are unusual, because they
A) are released from the host without the host bei ng l ysed.
B) have linear genomes.
C) replicate without a host.
D) are released from the host without being lysed and have linear
genomes.
7. How could overlapping genes in a positive ssDNA virus genome be
predicted?
A) Convert the positive ssDNA into its complementary ssDNA and
search for genes in the negative ssDNA strand for sequences used in
more than one predicted gene.
B) Directl y search the three frames of the positive ssDNA for genes that
have sequences where more than one gene is predicted.
C) Convert the positive ssDNA into negative ssDNA and search all six
possible frames for genes that use part of the same sequence.
D) Convert the positive ssDNA into its complementary ssDNA and
search for genes in the negative ssDNA strand that als o share a
complementary gene in the positive strand.
8. How are T7 genes transcribed?
D IVERSITY , AND E COLOGY
Test Bank for Brock Biology of Microorganism 16th Edition by Michael T.
Madigan
10.1 Multiple Choice Questions
1. Which t ype of viruses generall y has the smallest genome?
A) bacteriophages
B) DNA viruses
C) RNA viruses
D) viroids
2. The Baltimore Scheme to classify viruses contains a total of ______
groups based on _______.
A) four / genome composition
B) four / genome composition and transcription mechanism
C) seven / genome composition
D) seven / genome composition and tra nscription mechanism
3. Earl y and late viral proteins are classified according to their relative
A) evolutionary appearance in virus genomes.
B) stabilit y during infection.
C) time of synthesis following host infection.
D) transmission into virions.
4. Which t ype of viruses can be directl y used for translation?
A) dsRNA
, B) negative ssRNA
C) positive ssRNA
D) retroviruses
5. If the hypothesis stating viruses evolved prior to living organisms on
Earth is TRUE, the first t ype of viruses in the world were likel y
A) bacteriophages.
B) DNA viruses.
C) retroviruses.
D) RNA viruses.
6. The filamentous DNA phages are unusual, because they
A) are released from the host without the host bei ng l ysed.
B) have linear genomes.
C) replicate without a host.
D) are released from the host without being lysed and have linear
genomes.
7. How could overlapping genes in a positive ssDNA virus genome be
predicted?
A) Convert the positive ssDNA into its complementary ssDNA and
search for genes in the negative ssDNA strand for sequences used in
more than one predicted gene.
B) Directl y search the three frames of the positive ssDNA for genes that
have sequences where more than one gene is predicted.
C) Convert the positive ssDNA into negative ssDNA and search all six
possible frames for genes that use part of the same sequence.
D) Convert the positive ssDNA into its complementary ssDNA and
search for genes in the negative ssDNA strand that als o share a
complementary gene in the positive strand.
8. How are T7 genes transcribed?
