Who first determined that reactions could occur without the cellular structure of yeasts? buchner pasteur lister traube

The correct answer is Edward Buchner.  

It was demonstrated by Edward Buchner that fermentation can take place with the help of lifeless chemicals in spite of the living yeast. He stated that biochemical reactions can be witnessed externally to the living cells.  

He found that the yeast extract with no living yeast fungi can produce alcohol via a solution of sugar. The deduction was that biochemical procedures do not mainly need living cells, however, they are mediated by the unique enzymes, substances, which are formed in cells.  

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.