BIOD 171

M6: Module 6 Exam - Requires Respondus

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Question 1

2 / 2 pts

True or False. Because the genome is contained within an enclosed space (much like the

nucleus of a cell), viruses are classified as eukaryotic.

True

Correct!

False

False. Viruses are neither eukaryotic nor prokaryotic.

Question 2

Not yet graded / 5 pts

Describe the two basic components of a virus.

Your Answer:

The two basic components of a virus are the genomic materia and the viral capsid. The

genomic material contains DNA and RNA. The viral capsid is a membrane-like shell that

protects the genome.

A virus has (1) genomic material comprised of either DNA or RNA and (2) a capsid, a

membrane-like protective structure that contains the genetic material, similar to the

nucleus of a eukaryotic cell.

Question 3

Not yet graded / 3 pts

The ________ surrounds the capsid of some viruses.

Your Answer:

envelope

envelope

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Question 4

2 / 2 pts

True or False. You would expect to see a viral envelope on a virus infecting a plant cell.

True

orrect!

False

False. The overwhelming majority of animal viruses are enveloped whereas the majority of plant

or bacteria-infecting viruses are not.

Question 5

Not yet graded / 3 pts

Rank the following viruses based on their size from largest to smallest:

Paramyxovirus

Poliovirus

Smallpox virus

Your Answer:

Smallpox virus, Paramyxovirus, Poliovirus

Smallpox (~200nm) > Paramyxovirus (100-150nm) > Poliovirus (~30nm)

Question 6

2 / 2 pts

True or False: Highly infectious viruses undergo genome replication prior to viral

attachment and entry.

True

orrect!

False

False. The viral genome is never replicated before attachment and entry regardless of its level

of infectivity.

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