Which genome length best describes poliovirus?

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Study for the Poliovirus and Poliomyelitis Test. Prepare with engaging flashcards and detailed multiple-choice questions, each with hints and explanations. Ace your exam with confidence!

Multiple Choice

Which genome length best describes poliovirus?

Explanation:
Poliovirus has a compact, single-stranded, positive-sense RNA genome about 7.5 kilobases long. This size is typical for picornaviruses, which use one long polyprotein that is cleaved into structural and nonstructural proteins needed for viral assembly and replication. Because the genome is small and streamlined, around 7.5 kb best reflects its true length. The shorter option would likely be too small to encode all required viral proteins, while the larger options (around 15 kb or 30 kb) exceed what poliovirus genomes use and are more typical of much bigger RNA virus families, such as coronaviruses.

Poliovirus has a compact, single-stranded, positive-sense RNA genome about 7.5 kilobases long. This size is typical for picornaviruses, which use one long polyprotein that is cleaved into structural and nonstructural proteins needed for viral assembly and replication. Because the genome is small and streamlined, around 7.5 kb best reflects its true length.

The shorter option would likely be too small to encode all required viral proteins, while the larger options (around 15 kb or 30 kb) exceed what poliovirus genomes use and are more typical of much bigger RNA virus families, such as coronaviruses.

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