Biod 171 Exam 6 Questions With Complete Solutions

Biod 171 Exam 6 Questions With Complete Solutions True or False . Although viruses may contain their genome within an enclosed space ( much like the nucleus of a cell ) , it is considered neither eukaryotic nor prokaryotic . - ANSWER- True Describe the two basic components of a virus . - ANSWER- A has virus ( 1 ) genomic material comprised of either DNA or RNA and ( 2 ) a capsid , a membrane - like protective structure that contains the genetic material , similar to the nucleus of a eukaryotic cell . True or False . Because the genome is contained within an enclosed space ( much like the nucleus of a cell ) , viruses classified as eukaryotic . - ANSWER- False The envelope surrounds the ________ of some viruses . - ANSWER- capsid True or False . You would expect to see a viral envelope on a virus infecting a plant cell . - ANSWER- False The __________ surrounds the capsid of some viruses . - ANSWER- envelope Rank the following viruses based on their size from largest to smallest : Orthomyxovirus, Poliovirus, Variolavirus - ANSWER- Variolavirus, Orthomyxovirus, Poliovirus True or False : Highly infectious viruses undergo genome replication prior to viral attachment and entry . - ANSWER- False True or False : Viral replication occurs after it attaches and enters the host cell . - ANSWER- True Place the following viral life cycle steps in order beginning with viral attachment and provide a description of each step . Uncoating : Release : Replication : Attachment : Entry : New infection : - ANSWER- 1. viral attachment : viral receptors bind to the host proteins on surface of cell 2. entry : the virus fuses with host membrane 3. uncoating : the viral capsid disassembles 4. replication : viral genome makes copies of itself 5. release : new virus particles are produced and leave the cell 6. new infection : newly produced viruses leave the host cell and infect new cells A virus that infects bacteria is called a [ answer1 ] and contains a [ answer2 ] -sided polygon capsid . - ANSWER- 1. Bacteriophage 2. 20