Textbook Question
Why are humans considered “dead-end” hosts for many arboviruses?
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18. Viruses, Viroids, & Prions
Introduction to Animal Virus Infections
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following viruses has a membranous envelope?
A
Norovirus
B
Influenza virus
C
Adenovirus
D
Poliovirus
Verified step by step guidance1
Understand what a viral envelope is: It is a lipid bilayer membrane that surrounds some viruses, derived from the host cell membrane during viral replication or release.
Recall that enveloped viruses typically have a lipid membrane with embedded viral glycoproteins, which helps in entry into host cells and evasion of the immune system.
Identify the viruses listed: Norovirus, Influenza virus, Adenovirus, and Poliovirus, and classify them based on whether they are enveloped or non-enveloped.
Know that Influenza virus is an enveloped virus, possessing a membranous envelope derived from the host cell membrane.
Recognize that Norovirus, Adenovirus, and Poliovirus are non-enveloped viruses, meaning they lack a membranous envelope and have a more resistant protein capsid.
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