Exam 21: Viral Diversity

Most bacteriophages have_______ genomes.

The _______is the largest virus known, contains a 1.2 Mbp dsDNA genome (twice in size of the next largest virus known), and infects_______ in the environment.

In T7 the order of the genes influences the regulation of viral multiplication.

Describe how bacteriophages in the ocean influence the bacterial populations.

In 1977, Frederick Sanger and colleagues contributed to virology by being the first to_______.

Where within the host cell does coronavirus assembly occur?

What is the primer used to synthesize DNA with a retrovirus reverse transcriptase?

Despite being highly immunogenic, vaccinia viruses cause no serious health effects in humans.

Explain how vaccinia viruses are used to immunize humans against viruses other than vaccinia.

The polioviruses and the rhinoviruses are both classified as_______ , because they are typically very small and contain single- stranded RNA.

The nucleocapsid of vaccinia virus contains DNA surrounded by protein subunits.

Which genome composition has NOT been observed in bacteriophages?

When retroviral DNA is integrated into the host genome, the integrated element is known as a(n) _______.

Integration of Mu DNA into the host genome is essential for

The _______are among the largest and most complex animal viruses known.

Explain four features that make the M13 phage useful for genetic engineering.

Regulation of transcription in small RNA viruses occurs primarily by_______.

Plasmodesmata have channels so narrow that the tobacco mosaic virus (TMV) cannot easily pass through; however, free RNA is able to use the channels.

If a virus remains inactive in the host for long periods of time, it is said to be _______.

A filamentous phage has_______ symmetry.