Page 1 of 3: Chargaff's rule

kumar123 · Credits: 6007 My Scrapbook

This was discussed before but I couldnt find that post anywhere
Chargaff's rule is-
A+G=T+C
A/T= G/C
A=T=G=C
A+T=G+C
Ans given is 2
Is it 1??

ramyark31 · Credits: 128 My Scrapbook

I REMEMBER reading in one of the question banks as in dna A=T G=C ---called as chargaff's rule ....correct me if wrong

contagious · Credits: 818 My Scrapbook

the answer should be 2 only yaar

BRAVO · Credits: 45240 My Scrapbook

i agree

fibroma · Credits: 329 My Scrapbook

one is also correct

decembermist · Credits: 40831 My Scrapbook

ans is A)

decembermist · Credits: 40831 My Scrapbook

Chargaff's Rule" Total Pyrimidines (C+T) = Total Purines (A+G) in DNA

A + G = C + T

mdali007 · Credits: 5753 My Scrapbook

Chargaff's Rule states that total purines equals

total pyrimidines.

In dsDNA (or dsRNA) (ds = double stranded)

% A = % T (% U)

% G = % C

% purines = % pyrimidines

% A + % G = % T (% U) + % C

In other words 1 is definately the correct

answer !!!!

MockTurtle · Credits: 5597 My Scrapbook

Total purines(A+G)=Total pyrimidines(T+C)
which means that among 100 parts of DNA,50 will be accounted for by A+G and 50 by T+C So
A+G=T+C (STEP 1)
Taking this equation 1 step further,in 50 parts of DNA,25 will be accounted for by A and 25 by its complementary nucleotide T (The same holds for G and C)
So,
A(25 fractions) =T(25 fractions) =G(25 fractions) =C(25 fractions)

So,A=G=T=C

I'D GO FOR OPTION C

mdali007 · Credits: 5753 My Scrapbook

MockTurtle when you took it to the next level you

also took it out of the limitations of the Chargaff's

rule .. no doubt you may be right but it doesn't

comply to Chargaff's rule anymore ... I still say

that the answer is definately 1 and hold my

stance !!!

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