Question

According to Chargaff's rules, the amount of adenine in DNA equals the amount of
A. Uracil
B.Guanine
C.Thymine
D.Cytosine

Answer 1

%Adenine = %Thymine
ratio of 1:1

The following table is a representative sample of Erwin Chargaff's 1952 data, listing the base composition of DNA from various organisms and support both of Chargaff's rules.[13]
Organism %A %G %C %T A/T G/C %GC %AT
φX174 24.0 23.3 21.5 31.2 0.77 1.08 44.8 55.2
Maize 26.8 22.8 23.2 27.2 0.99 0.98 46.1 54.0
Octopus 33.2 17.6 17.6 31.6 1.05 1.00 35.2 64.8
Chicken 28.0 22.0 21.6 28.4 0.99 1.02 43.7 56.4
Rat 28.6 21.4 20.5 28.4 1.01 1.00 42.9 57.0
Human 29.3 20.7 20.0 30.0 0.98 1.04 40.7 59.3
Grasshopper 29.3 20.5 20.7 29.3 1.00 0.99 41.2 58.6
Sea Urchin 32.8 17.7 17.3 32.1 1.02 1.02 35.0 64.9
Wheat 27.3 22.7 22.8 27.1 1.01 1.00 45.5 54.4
Yeast 31.3 18.7 17.1 32.9 0.95 1.09 35.8 64.4
E. coli 24.7 26.0 25.7 23.6 1.05 1.01 51.7 48.3


http://library.thinkquest.org/C0118084/History/Chargaff.htm

Answer 2

Thanks!

Answer 3

No Worries :D