quiz Flashcards
(21 cards)
Who coined evolution? when? and what book?
charles darwin, origin of species 1859 nov 24
How many of charles darwin’s book were sold?
1250 all sold
who found the 3-d structure of DNA and when?
watson and crick 1953 April 25
How are the advancements (3-d structure of dna and evolution) similar?
-universal phenomena meaning they are both evolutionarily old and very successful
-both involve dna
Who discovered DNA? when? and how?
-friederich miescher, 1869
-found protein like substance from bloody bandages that contained H,C,N,O and phosphate group
Who discovered transformation? when? how?
frederick griffith 1928
-in his experimentation with strep he discovered that dead s cells caused living r cells to be deadly
what is transformation?
change due to assimilation of a foreign sub by a cell
Who discovered that dna caused transformation? when?
avery-maclead-mccarty, 1944
Who showed that dna was the blueprint to life? when? how?
hershey and chase, 1972
- experiment w/ t2 cells (dna+protein), t2 cells w dna infected
Who found that dna composition varied from species to species? when?
erwin chargaff, 1947
Who discovered the alpha helical structure of dna? when?
herman branson with pauling, 1948
What is dna composed of?
phosphate, 5-C sugar, 4 N-bases
Who used x-ray crystallography to study the structure of dna?
wilkins and franklin
What are purine’s, what are pyrimidine’s?
purine- A, G
pyrimidine- T,C
What did watson and crick newly discover about the pairing of n-bases?
purine + pyrimidine
How is DNA structured?
sugar p chain on outside and n bases on inside, twist every 10 bases, 2 alpha helixes wound together
Who was the first AA woman to get a phd in chen and credited by watson and crick?
dr. marie daly
What happened to pauling?
he tried to propose a triple helix, bases face outward phosphate on inside
What enzyme does the unzipping in dna replication?
helicase
What lays down the nucleotide in dna replication?
dna polymerase
who proved watson and cricks
‘s semi conservative model?
mehelson and stahl
