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Molecular Basis Of Inheritance

Question
CBSEENBI12002243
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Which one of the following is not applicable to RNA?

  • Complementary base pairing

  • 5, phosphoryl and 3' hydroxyl ends

  • Heterocyclic nitrogenous bases

  • Chargaff's rule

Solution

D.

Chargaff's rule

Chargaff's Rule is not applicable to RNA. He is the generalisations formulated about DNA structure. The rule states that DNA from any cell of all organisms should have a 1:1 ratio (base pair rule) of pyrimidine and purine bases, i.e. the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine. Further complementary base pairing is sometimes, visible is RNA as well (in doubled stranded RNAs of viruses) hence option (a) is not taken into consideration. 

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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