1. Which of the following is the agent associated with the development of neurodegenerative disease in livestock and humans?

A. Prions
B. Viroids
C. virions
D. Virions


Correct Answer: A. Prions

2. __________is probably the most important characteristic for classification of viruses in eukaryotes.

A. Host preference
B. Morphology
C. Physical nature of virion constituents
D. Chemical nature of virion constituents


Correct Answer: A. Host preference

3. The __________ of the influenza-enveloped virus appears to be involved in attachment to the host cell receptor site.

A. fimbriae
B. flagella
C. hemagglutinin
D. neuraminidase


Correct Answer: C. hemagglutinin

4. Intracellular structures formed during many viral infections, called __________ , which can directly disrupt cell structure.

A. prokaryotes
B. chromosomal disruptions
C. inclusion bodies
D. cytocidal bodies


Correct Answer: C. inclusion bodies

5. Viral RNA is replicated in the host cell

A. cytoplasmic matrix
B. nucleus
C. mitochondria
D. lysosomes


Correct Answer: A. cytoplasmic matrix

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