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Molecular Basis Of Inheritance

Question
CBSEENBI12000303
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If a double stranded DNA has 20 per cent of cytosine, calculate the percent of adenine in the DNA.

Solution
In a double stranded DNA, according to Chargaff's rule of base pairing
%of A= % of T, and
% of G = % of C
Therefore if % of Cytosine is 20% then % of Guanine also will be 20 %
And the remaining 60 % will be 30% of Cytosine and 30 % of Adenine.

Some More Questions From Molecular Basis of Inheritance Chapter

List the number of base pairs in :

(i) lambda bacteriophage

(ii) E.coli and

(iii) haploid content of human DNA.

Comment two chains of DNA have antiparallel polarity.

What is the difference between DNAs and DNAase ?

Which was first genetic material ?

Suggest one evidence to prove that RNA was first genetic material.

Why was RNA unstable ?

What made DNA more preferrable as genetic material ?

Process of replication is completed in how much time in E.coli ?

What is average rate of polymerization ?

List three components of transcription unit.

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