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MCB EXAM 3 Quiz 13
Terms in this set (12)
The enzyme used by retroviruses to make a DNA copy of their RNA genome is called
The genomes of ________ can be translated upon entry into the host cell.
positive-strand (plus strand, sense strand) single strand RNA viruses
When RNA-dependent RNA polymerase is synthesizing mRNA it is functioning as a ________; but when it is copying an RNA genome, it is functioning as a _________
Which enzyme is used by RNA viruses to directly replicate the viral RNA genome?
RNA-dependent RNA polymerase
Viruses infecting algae (photosynthetic protists like diatoms) have never been detected.
A ________ is a sequence-specific recognition protein with endonuclease activity
Attachment of a virus to its host cell requires specific surface proteins on the bacteriophage and specific receptor molecules on the host cell
The largest viruses known are the
Assembly of virions is a simple process and does not require expression of any genes from the viral genome.
For T4 phages, like the one seen in the video (screenshot below), the nucleic acid enters the host cell, but the capsid is left outside.
Only double-stranded (ds) DNA viruses can cause cancer in humans.
In the case of animal viruses, like herpesviruses that cause chickenpox and shingles, a(n) ________ infection is one in which the virus quits reproducing and remains dormant for a period before becoming active again.
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