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Molecular Basis of Inheritance

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

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


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.

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.

274 Views

How many nucleotides are present in a bacteriophage ϕ x 174.

5386
805 Views

Name the genetic material for majority of organisms.

DNA (Deoxyribose nucleic acid)
965 Views

List the number of base pairs in :

(i) lambda bacteriophage

(ii) E.coli and

(iii) haploid content of human DNA.


(i) 48502 bp
(ii) 4.6 x 106 bp and
(iii) 3.3 x 109 bp.
757 Views

Comment two chains of DNA have antiparallel polarity.

The Two chain of DNA are antiparallel that is
if one chain has 5’ x 3’ polarity the other chain has 3’ x 5’ polarity.
658 Views

List the function of RNA.

Functions of RNA
RNA acts as genetic material in viruses
It also functions as an adapter and messenger 
It also acts as a catalytic molecule and catalyses various biochemical reactions.
721 Views