Exam (elaborations)
MBY 161 Theme 3 Exam Questions And Correct Answers
- Course
- Institution
MBY 161 Theme 3 Exam Questions And Correct Answers...
[Show more]
Content preview
MBY 161 Theme 3 Exam Questions And Correct Answers3 basic shapes of prokaryotic cells - Answer Bacillus
Coccus
Spiral
3 different spiral shapes - Answer Spirillium
Vibrio
Spirochete
Describe flagella - Answer Made of chains of flagellin
Attached to a protein hook
Anchored to the cell wall and membrane by the basal body
Describe fimbriae - Answer hair-like appendages, shorter and thinner than flagella
allow attachment
Describe Pili - Answer Longer than fimbriae and only one or two per cell
Facilitate transfer of DNA from one cell to another
gliding motility
twitching motility
What does the cell wall of Prokaryotes prevent? - Answer osmotic lysis: when a cell
bursts due to an osmotic imbalance that has caused excess water to move into the cell
Functions of Prokaryotic cell wall - Answer - Maintain shape
, - Anchor for Flagella
- Can play a role in the ability to cause disease
What is Peptidoglycan? - Answer A polymer of the disaccharides:
- N-acetylglucosamine (NAG)
- N-acetylmuramic acid (NAM)
Describe a gram-positive cell wall - Answer Thick Peptidoglycan
Teichoic acids
- lipoteichoic acid links to plasma membrane
- Wall teichoic acid links to peptidoglycan
May regulate movement of cations
Pollysaccharides provide antigenic variation (Diagnostic application)
Describe a gram-negative cell wall - Answer Thin peptidoglycan
Outermembrane
Periplasmic space
Gram-negative outer membrane consists of - Answer Lipopolysaccharides
Porin proteins
What do lipopolysaccharides consist of? - Answer Lipid A - embedded in the top layer of
the outer membrane
Core polysaccharide - Attached to lipid A
O polysaccharide - Projects out of the core polysaccharide
Role of Lipid A - Questions Lipid A is released upon death of Gram-negative bacteria, it
serves as an endotoxin.
Define Endotoxin - Questions a poison within a bacterial cell that is released upon lysis .
What is the role of the Core polysaccharide? - Questions Structural- to provide stability
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 Easton. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
80461 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now