BIO 214 MICROBIOLOGY Questions and Complete solutions

BIO 214 Module 4 Helical and icosahedral are terms used to describe the shapes of a virus: core capsid spike envelope capsomere ANSWER: capsid Viruses acquire envelopes around their nucleocapsids during: release penetration assembly adsorption replication ANSWER: Release Viruses that cause infection resulting in alternating periods of activity with symptoms and inactivity without symptoms are called: prions delta agents oncogenic chronic viroids ANSWER: Chronic Bovine spongiform encephalopathy is: caused by a viroid also called "mad cow disease" a spongiform encephalopathy of humans initiated by an oncogenic virus caused by a chronic latent virus ANSWER: also called "mad cow disease" How do viruses enter their host? Bursting the host cell Rupturing the virus Fusion or endocytosis Exocytosis None of these are correct ANSWER: Fusion or endocytosis Airways can be sterilized by UV light creating pyrimidine dimers which interfere with DNA replication, this mechanism of sterilization is_________________. Desiccation Ionizing radiation Filtration Non-ionizing radiation Lyophilization ANSWER: Non-ionizing radiation