DNA RNA

lesson 1

What was griffiths transformation experiments?

a substance from the dead bacteria was able to mutate live bacteria = transforming material

Avery Macleod, McCarthy

treated a bacteria filtrate with enzymes to find out that the transforming substance was DNA

Heinz Fraenkel and Bea singer

created viruses hybrides of tobacco mosiac virus to show that RNA was the genetic material of viruses.

A and G are classified as

double ringed purines

c and t are classified as

single ringed pyrimidines

what is a nucleoside?

base/sugar

Are proportions of A and T equal?

yes

The discovery of DNA marked the

beginning of molecular genetics

a w/ t has how many h bonds

2

three characteristics of a dna

high salt conditions, very compact, right handed.

three characteristics of b dna

low salt conditions, right handed turns, most significant

three characteristics of z dna

left handed, zig zag form, formed with many c-g pairs

Name 4 characteristics of RNA

1. single stranded

2. C2 has oh group therefore ribose sugar

3. less stable

4. can form complex 3d structures from folding and pairing with itself