What would be the consequence of deleting the late T4 genes?
A) The T4 genome would not be copied.
B) T4 mRNA would not be produced.
C) T4 capsid proteins would not be made.
D) ATP would not be produced and the T4 genome would not be packaged into the capsid.
You isolate a purify a bacteriophage that can replicate in E. coli. Through chemical analyses you determine that the only nucleic acid present is RNA.
You isolate the RNA and put it in a test tube with all of the necessary proteins and RNAs for translation. The RNA is translated and new infectious virions are made. What does this tell you about the bacteriophage?
A) The RNA genome is of the plus sense.
B) The RNA genome is of the plus sense and RNA replicase is present in the viral capsid.
C) The new bacteriophage is a retrovirus.
D) RNA replicase is present in the viral capsid.
How do bacteriophage influence bacterial evolution?
A) Bacteriophage cause cleavage and rearrangement of bacterial genomes, thus accelerating bacterial evolution.
B) Bacteriophage lyse mutated bacterial cells, thus preventing them from replicating and passing on their genetic information.
C) Bacteriophage transfer genetic information between bacterial cells through transduction, thus increasing the genetic diversity of bacterial populations.
D) Bacteriophage decrease the size of bacterial populations and thus decreasing genetic diversity and slowing down bacterial evolution.
In a natural population of diverse slow-growing prokaryotic cells, what type of viruses would you expect to be most common?
A) lytic bacteriophages
B) enveloped viruses
C) icosahedral viruses
D) temperate bacteriophages
A cell that allows the complete replication cycle of a virus to take place is said to be a
A) permissive host.
B) viral cell.
C) dead cell.
D) lytic cell.
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