Operon Institute of Biological Sciences

13/06/2018

DNA was discovered in 1869 by Frederick Miescher, who was then 25 years old.
Miescher was the son of a well-known physician in Basel. In 1869 he had gone to Tubingen to study the chemistry of white blood cells with the biochemist F. Hoppe-Seyler. He used pus obtained from postoperative bandages, as a source of the cells. When he added weak hydrochloric acid to the pus he obtained pure nuclei. If he added alkali and then acid to the nuclei a gray precipitate was formed. The precipitate was unlike any of the known organic substances. Since it came from the nucleus, Miescher called it nuclein. Today it is called DNA.

13/06/2018

It's interesting about the replication of DNA...must read...!!!!!
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13/06/2018

Its all about DNA replication...Must read...!!!!!

05/08/2017

If compound A is converted into intermediate B and C ... then C is converted to product D .
How many enzymes are used in this reaction
A -> B -> C -> D.
A.1
B.2
C.3
D.4

05/08/2017

Which of these catalyzes the synthesis of RNA from a DNA template?
A. DNA gyrase
B. DNA ligase
C. DNA polymerase
D. RNA polymerase

04/08/2017

Ultraviolet (UV) light is a form of radiation that acts as a mutagen, an agent that causes mutations in DNA. Exposure to ultraviolet light causes chemical changes that alter the shape of your DNA, and the process that corrects DNA’s shape can also cause changes to the DNA code. Sunlight is a strong source of UV light and it can cause damage to the DNA in the surface layer of your skin after repeated or prolonged exposure, increasing your risk for skin cancer.

02/09/2016

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26/08/2016

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26/08/2016