Class notes
BIO152 WK7 Lecture Notes
- Course
- Institution
BIO152 Sem 2 2018 Lecture Notes - Week 7
[Show more]
Seller
Follow
stephjane
Content preview
BIO152 WEEK 7The Code of Life
Diversity of life
- All organisms need to:
- Regulate the exchange of materials
- Handle energy transfer
- Use their hereditary material to direct protein synthesis
- Duplicate their hereditary material
- And reproduce
DNA
- DNA allows us to understand:
- How organisms make proteins and enzymes
- How organisms reproduce
- How they pass on traits to the next organism
- How they change over tme and create new species
How does DNA control biology?
- Enzymes are the principle molecules that facilitate reactons of life
- But enzymes are proteins, made of a sequence of amino acids
- One protein difers from another based on the amino acid sequence
DNA and hereditary
- In eukaryotc cells, DNA is housed in the nucleus
- Formed as chromosomes, each chromosome is one complete DNA molecule
- DNA is the molecule copied from one generaton to the next
- DNA encodes informaton critcal for cellular processes
DNA, RNA and protein
- DNA bound histone proteins
- Forms chromatn
- Chromatn packed into nucleosomes
- Forms loops
- Condenses into chromosome
- Results in a 10,000-fold reducton in size
Eukaryotc nuclear structure
- Nucleolus:
- dense, non-membranous sub-organelle
- Site of synthesis of a type of RNA (ribosomal RNA)
- Euchromatn:
- Uncondensed chromatn that stains poorly
- DNA that is undergoing transcripton
- Heterochromatn:
- Heterochromatn condensed chromatn that stains well
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 stephjane. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
64438 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now