Who demonstrated that cell-produced proteins called enzymes were responsible for chemical reactions in a cell?

Eduard Buchner
Robert Koch
Lazzaro Spallanzani
Louis Pasteur


Eduard Buchner

Biology & Microbiology

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Fats and fatty acids

A. are insoluble in water. B. contain the same fatty acids. C. have the same number and location of C-C double bonds. D. have the same molecular length. E. are liquid or solid at room temperature, regardless of chemical composition.

Biology & Microbiology

The first major divergence of life gave rise to all of

the following except a. bacteria. b. archea. c. ancestors of the eukaryotes. d. endomembrane system. e. all of these.

Biology & Microbiology

The only chyme molecule that is absorbed in significant amounts by the stomach is water.

Answer the following statement true (T) or false (F)

Biology & Microbiology

In order to be successful, chemotherapy drugs have to stop cell division. The most likely method for this would be to ________

A) denature all the enzymes in the cell so division can't occur B) speed up the cell cycle in the cancerous cells C) stop cellular respiration so the cancerous cells don't have energy D) interfere with the function of the spindle fibers

Biology & Microbiology