Class notes
Structure and Function of Prokaryotic and Eukaryotic Cells and Microscopy
- Course
- Institution
Lecture notes on the structure and function of prokaryotic and eukaryotic cells and microscopy
[Show more]
Seller
Follow
polinalobacheva
Reviews received
Content preview
Structure and Function of Prokaryotic and Eukaryotic cellsCell-Surface Structures:
Component Description Function
Cell membrane / Thin structure lying inside the - Selective barrier through which materials exit and enter the cell = selective
plasma cell wall and enclosing the permeability
membrane / cytoplasm of the cell. - Large molecules e.g. proteins can not pass through membrane
inner membrane - Allows entry of smaller molecules e.g. H20, CO2 and some simple sugars
Outer Thin structure lying beyond - Selective barrier
Membrane the cell wall. Only Gram- - Contains proteins for transport
negative bacteria - Lipopolysaccharide – bacterial defence
- Allows selective uptake and efflux
Cell wall Contains peptidoglycan, a - Maintains cell shape
network of sugar polymers - Protects the cell
cross linked by polypeptides. - Prevents cell from bursting in a
Made of 2 monosaccharides N hypotonic environment
Acetylglucosamine (NAG) and
N-acetylmuramic acid (NAM) (Eukaryote cell walls are made of
which are related to glucose. cellulose or chitin)
, (Archaea contain polysaccharides and proteins but lack
peptidoglycan). Gram stain used to classify bacteria by cell
wall composition:
- Gram-positive bacteria have simpler walls with a large
amount of peptidoglycan
- Gram-negative bacteria have less peptidoglycan and
an outer membrane that contains lipopolysaccharides
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 polinalobacheva. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.98. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
66475 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now