A concise and clear overview of the key concepts covered in chapter 2. These notes make biology easy to understand and are a good place to start your revision and boost your grades.
- Eukaryotic cells have a membrane- bound nucleus and
prokaryotic do not
- Prokaryotic cells have no membrane - bound structures, they
tend to be small, simple cells, measuring around 0.1 - 5µm in
diameter
- While prokaryotic cells do not have membrane-bound
structures, they do have distinct cellular regions. In prokaryotic
cells, DNA bundles together in a region called the nucleoid.
- eg. bacteria and archaea
- eukaryotes are organisms whose cells have a nucleus and
other organelles enclosed by a plasma membrane.
- Eukaryotic cells are large (around 10-100 μm) and complex.
While most eukaryotes are multicellular organisms, there are some single-cell eukaryotes.
- eg. animals, plants, fungi, algae and protozoans
- info: technology networks : cell science
Laser Scanning Confocal Microscopy
- optical imaging technique for increasing optical resolution and
contrast of a micrograph by using a spatial pinhole to block out of
focus light in the image formation
- CLSM combines high-resolution optical imaging with depth selectivity
which allows us to do optical sectioning. This means that we can view
visual sections of tiny structures that would be difficult to physically
section (e.g. embryos) and construct 3-D structures from the obtained
images.
- The CLSM works by passing a laser beam through a light source aperture
which is then focused by an objective lens into a small area on the surface of your sample and
an image is built up pixel-by-pixel by collecting the emitted photons from the fluorophores in the
sample.
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 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 georgiawelch38. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £4.99. You're not tied to anything after your purchase.
