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Molecular Basis Of Inheritance

Question
CBSEENBI12002680
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Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?

  • Thymine, Uracil - Pyrimidines

  • Uracil, Cytosine - Pyrimidines

  • Guanine, Adenine - Purines

  • Adenine, Thymine - Purines

Solution

D.

Adenine, Thymine - Purines

DNA and RNA the principal genetic materials of living organisms are chemically called nucleic acids. These are polymers of nucleotides. Each nucleotide is composed of phosphoric acid, a Pentose sugar and a nitrogenous base. The nitrogenous bases are of two types, ie, Purine and pyrimidines.
Prices are heterocyclic and two rings compound, eg, adenine, guanine.
Pyrimidines are single ring compound, eg, thymine, cytosine, uracil.

Some More Questions From Molecular Basis of Inheritance Chapter

Name the genetic material for majority of organisms.

List the function of RNA.

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 ?

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