BIOD 171 Essential Microbiology Portage Learning Module M6: Module 6 Review

Due No due date Points 5 Questions 19 Time Limit None Attempt History Attempt Time Score LATEST Attempt 1 30 minutes 0 out of 5 * Score for this quiz: 0 out of 5 * Submitted Dec 31 at 9:39pm This attempt took 30 minutes. Question 2 Not yet graded / 0 pts What is an obligate intracellular parasite? Your Answer: viruses cant replicate only inside a living host i think. the viruys depends on a living host to provide proteins so it can replicate and make some extra copies of itself. As an obligate intracellular parasite, viruses cannot (obligate) replicate unless inside (intracellular) a living host cell. As a parasite, a virus depends on its living host to provide the framework (proteins, etc) to replicate—to make additional copies of itself. they are either one! No. Viruses are neither prokaryotic nor eukaryotic. What is the viral envelope, and what does the presence (or absence) of it tell you about the type of virus? Your Answer: Question 4 Not yet graded / 0 pts The capsid is a membrane-like protective structure that contains the genetic material, similar to the nucleus of a eukaryotic cell. Your Answer: protective structure like a membrane it has gene material like a nucleus What is a viral capsid? Question 3 Not yet graded / 0 pts Due to its size (~30-150 nm) most viral capsids must be visualized via electron microscopy. Your Answer: it needs an electron mucroscope like a size of this guy whivh is like 30-150 nm What type of microscope would be used to study the shape of a viral capsid? Question 5 Not yet graded / 0 pts its around a viral capsid its from hose cell. it has an additional barrier to the outside environment. a lot of animal viruses are like enveloped but plant / bacteria aren't The envelope surrounds the viral capsid, is derived from the host cell membrane and serves as an additional barrier to the external environment. The overwhelming majority of animal viruses are enveloped whereas the majority of plant or bacteria-infecting viruses are not. What must happen before viral replication of its genome can occur? Question 7 Not yet graded / 0 pts Question 6 Not yet graded / 0 pts How does the viral envelope both aid in cell entry as well as hide it from being detected by the immune system? Your Answer: it has proteins in envelope. it comes from a host cell membrane. makes it similar to the normal host cell. The viral envelope contains the necessary proteins required for interaction with host cells. As the envelope is derived from the host cell membrane, this camouflages the virus and lowers the likelihood of immune detection by making it appear similar to the normal biological host cell. Describe the basic steps of the viral life cycle. Your Answer: attachment bind to host proteins and entry is the viruses enters the cell uncoating is where it dissembles replication has a blue print exit is new viruses produced. new infection leave host cell. Question 8 Not yet graded / 0 pts Your Answer: genome is replicated. For all viruses, the genome is replicated following attachment and entry, never before. A bacteriophage is simply a virus (phage) that infects bacteria. Your Answer: infects bacteria What is a bacteriophage? Question 9 Not yet graded / 0 pts 1. Attachment: Viral receptors bind to host proteins on the surface of the cell. 2. Entry: The virus fuses with the host membrane and enters the cell 3. Uncoating: (where applicable) the viral capsid disassembles 4. Replication: The viral genome provides the ‘blueprint’ to make copies of itself 5. Exit: New viruses are produced and leave the cell 6. New infection: Newly produced viruses leave the host cell and go on to infect new cells. The process outlined above now restarts.