Nucleic acids (DNA and RNA) act as genetic material in all organisms and viruses: 1. Evidences from Bacteria 2. Evidence from Bacteriophages 3. Evidence from Bacterial Conjugation 4. Evidence from RNA Viruses. 1. Evidences from Bacteria: For the first time, an English Health officer, Frederick Griffith (1928) gave an experimental evidence that the DNA was […]
Evidences of Nucleic Acids as Genetic Material | Microbiology
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DNA as a Genetic Material | Biology
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In this article we will discuss about DNA as a genetic material. Transforming Principle: Frederick Griffith in 1928, carried out a series of experiments with Streptococcus pneumoniae (a bacterium that cause pneumonia). He observed that when these bacteria (Streptococcus pneumonia) are grown on a culture plate, some of them produce smooth, shiny colonies (S-type), whereas, […]
DNA Strand Diagram | Biology
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The below mentioned article provides a diagram of DNA strand. (a) DNA is made up of two polynucleotide chains. The backbone is constituted by sugar-phosphate, while the nitrogenous bases project inwards. (b) The two chains have anti-parallel polarity. Therefore, when one chain has 3′ → 5’polarity, the other chain has 5′ → 3′ polarity. (c) […]
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