Exam (elaborations)
BIO 111 EXAM 3 QUESTIONS AND ANSWERS ELABORATIONS BASED ON FINAL EXAM!!
- Course
- Institution
BIO 111 EXAM 3 QUESTIONS AND ANSWERS ELABORATIONS BASED ON FINAL EXAM!!
[Show more]
Content preview
BIO 111 EXAM 3 QUESTIONS AND ANSWERS ELABORATIONSBASED ON FINAL EXAM!!
Freiedrich Miescher
Answers:1869- Isolated phosphate rich acidic comp termed nuclein (DNA)- pus in
hospital bandages
Phoebus Leven
Answers:1920s- Isolated sugars of RNA and DNA and 4 diff nucleotides in DNA-
EST TETRANUCLEOTIDE HYPOTHESIS- equal ratios though
Frederick Griffith
Answers:1928- studies strep in in vivo model (mice)-- living R bacteria was
transformed into pathogenic S bacteria by some heritable substance
Avery, MacLeod, McCarty
Answers:1944- used in vitro (lab) model- strep- determined DNA is what was
transmitted from one gen to next
Erwin Chargaff
Answers:1950- analyzed base comp of DNA in multiple org.-- DNA comp varies
from species to species. % A = %T and %G = %C
Alfred Hershey and Martha Chase
Answers:1952- studies bacteriophages (T2)-- DNA accepted as THE inheritable
substance
Rosalind Franklin and Maurice Wilkins
, Answers:1952- Imaged DNA-- 2 antiparallel sugar phosphate backbones--
nitrogenous bases paired in molecules interior (image 51)
James Watson and Francis Crick
Answers:1953- developed double helix model-- T pairs w A, G pairs w C
Nucleotide
Answers:phosphate group, sugar, nitrogenous base
Pyrimidine bases
Answers:CUT- cytosine, thymine, uracil
Purine bases
Answers:AGs are pure-- adenosine and guamine
DNA double strand
Answers:- sugar and phosphate on outside, nucleotides on inside. Antiparallel and
directional
3' end vs 5' end
Answers:3'-- OH (hydroxyl) at end
5' end-- OPO3(phosphate group)- at end
euchromatin
Answers:DNA that gets expressed-- loosely packed chromatin
heterochromatin
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 IANWAZASKISTUVIA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77858 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now