Bio 205 - Chapter 13 Latest Test Questions with Correct Revised Solutions 2025.

Bio 205 - Chapter 13 Latest Test
Questions with Correct Revised
Solutions 2025.
What is a virus? - Answer - Obligatory intracellular parasites

- Reproduce in a host

- Lacks enzymes (uses hosts)

- Are nonliving, non-cellular infectious particles

- Can live (and lay dormant) almost everywhere



What is a host range? - Answer - Range of hosts that a virus can infect

- Usually narrow range

- Range determined by attachment (receptors)



What is the structure of a virus? - Answer INSIDE - just genetic material



OUTSIDE - essentially made of protein



Capsid - Answer protein covering



Envelope - Answer - membrane from host

- not always present



Spikes - Answer not always present



Helical - Answer - Rabies, Ebola



Polyhedral - Answer - adenovirus ( cold ), polio



Enveloped - Answer - influenza, herpes

, - bacteriophages



Poxviridae - Answer - small pox and chicken pox

- enveloped

- part of DNA



Herpesviridae - Answer - human herpes virus

- enveloped

- part of DNA



adenoviridae - Answer - common cold

- naked

- part of DNA



papovaviridae - Answer - HPV

- naked

- part of DNA



hepadnaviridae - Answer - hepatitis

- naked

- part of DNA



retroviridae - Answer - HIV

- enveloped

- part of RNA



filovirus - Answer - ebola

- enveloped

- part of RNA



orthomyxovirus - Answer - influenza