Viruses — Flashcards

Flashcard 551: Which viral genetic phenomenon is characterized by virus A providing a functional protein to replace the nonfunctional virus B protein?_____

Answer: Complementation

Flashcard 552: Picornavirus have viral _____ which cleave the large translated polypeptide into functional viral proteins

Answer: proteases

Flashcard 553: Norovirus is associated with consumption of _____

Answer: shellfish (ie: oysters)

Flashcard 554: Which virus causes middle east respiratory syndrome (MERS)?_____

Answer: Coronavirus

Flashcard 555: Positive sense RNA viruses carry RNA that is structurally similar to _____

Answer: mRNA

Flashcard 556: The segmented virus families include bunyavirus, _____, arenavirus, and reovirus

Answer: orthomyxovirus

Flashcard 557: Antigenic _____ explains why we need a flu shot each year

Answer: drift

Flashcard 558: Which virus characteristically causes destruction of the anterior horn cells of the spinal cord, leading to asymmetric flaccid paralysis?

Answer: Poliovirus

Extra: Poliomyelitis is caused by the poliovirus (a Picornavirus). It specifically targets the lower motor neurons in the anterior horns of the spinal cord, resulting in lower motor neuron (LMN) signs such as asymmetric flaccid paralysis, muscle atrophy, fasciculations, and hyporeflexia.

Flashcard 559: Outbreaks of Zika virus are more common in _____ climates

Answer: tropical

Flashcard 560: Which type of virus is parainfluenza (croup)?_____

Answer: Paramyxovirus