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Summarize the foundations of modern biotechnology using microorganism from Year 1838 up to 1953 discovery by Crick and Watson.

      

Summarize the foundations of modern biotechnology using microorganism from Year 1838 up to 1953 discovery by Crick and Watson.

  

Answers


Jim
Foundations of modern biotechnology (1838-1953).
? 1838, Matthias Schleiden, determined that all plant tissue was composed of cells and that each plant arose from a single cell.
? 1839, Theodor Schwann, came to a similar determination as Schleiden, for animals.
? 1858, Rudolf Virchow, concluded that all cells arise from cells and the cell is the basic unit of life.
? Before cell theory the main belief was vitalism: whole organism, not individual parts, posses life.
? By the early 1880s, microscopes, tissue preservation technology, and stains allowed scientists to better understand cell structure and function.

1952: Alfred Hershey and Martha Chase.
?Used T2 bacteriophage, a virus that infects bacteria.
?Radiolabeled the bacteriophage with S35 (Protein) and P32 (DNA).
?Bacterial cells were infected and put in a blender to remove phage particles.
?Analysis showed labeled DNA inside the bacteria and was the genetic material.

1953 watson and crick.
• Determined the structure of DNA.
• Rosalind Franklin and Maurice Wilkins provided Xray diffraction data.
• Erwin Chargaff determined the ratios of nitrogen bases in DNA.
• DNA replication model.
• DNA bases made up of purine and pyrimidine.
jim items answered the question on March 28, 2019 at 12:32


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