Exam (elaborations)
Exam 2 Study Guide Microbiology (BIOL 2104) Questions and Complete Solutions Graded A+
- Course
- Institution
Exam 2 Study Guide Microbiology (BIOL 2104) Questions and Complete Solutions Graded A+
[Show more]
Content preview
Exam 2 Study GuideMicrobiology (BIOL 2104)
Questions and Complete
Solutions Graded A+
Denning [Date] [Course title]
, What are the characteristics of viruses? - Answer: they are not cells; are obligate intracellular parasites
of other organisms; do not independently fulfill the characteristics of life; active only inside host cells;
have basic structure of protein shell surrounding nucleic acid; ubiquitous in nature; ultramicroscopic in
size; lack enzymes for basic metabolic processes; can't synthesize proteins on their own; infectious
particles
What are the components of viruses? their functions? - Answer: Consist of a covering (capsid, envelope)
and a central core (DNA/RNA, protein). Coverings protect the virus and surround it. The central core
houses the genetic material. Have spikes, which allow viruses to dock with their host cells
viroid - Answer: an infectious agent that lacks a capsid and consists of a closed circular RNA molecule;
capable of infecting plants
virion - Answer: an elementary virus particle in its complete morphological and infectious form. Consists
of a nucleic acid core surrounded by a capsid
prion - Answer: a mutated protein capable of causing brain deterioration in cattle or other mammals.
Contains no nucleic acid. Examples include BSE and Creutzfeldt-Jakob disease
satellite virus - Answer: a virus which is dependent on another virus for survival
What is an envelope virus and how does it obtains its envelope? - Answer: an envelope virus is a
nucleoprotein that is surrounded by a membrane. It obtains its envelope from being released from a
host cell, in which they then take with them a bit of the host's plasma membrane
How do animal viruses multiply? Sequence of events? - Answer: 1. adsorption: the virus attaches to its
host cell by specific binding of its spikes to cell receptors
2. penetration: the virus is engulfed into a vesicle and its envelope is uncoated
3. uncoating: frees the viral RNA into the cell cytoplasm
4. synthesis: under the control of viral genes. the cell synthesizes the basic components of new viruses
5. assembly: viral spike proteins are inserted into the cell membrane for the viral envelope; nucleocapsid
is formed from RNA and capsomeres
6. release: enveloped viruses bud off the membrane, carrying away an envelope with the spikes
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller YourExamplug. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73091 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now