By: McKenna Evert

Biochemistry is the chemistry of the living world and one of the fields of chemistry. Biochemists have to study about the living world and the chemical world. It's also about the molecules that make up all the organisms.

Rudolph Marcus

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Rudolph Marcus was born July 21, 1923 in Montreal Canada. He attended the California Institute of Technology in Pasadena, CA, USA, and he studied theoretical chemistry. His father's name is Myer Marcus, and his mother's name is Esther Cohen Marcus. He was married to his wife, Laura Hearne, from 1949 to 2003 and had three children together; Alan Rudolph Marcus, Kenneth Hearne Marcus, and Raymond Arthur Marcus.

He earned a PhD and B.S. from McGill University and won the Nobel Prize in 1992. He is most famous for his theory on electron transfer reactions. His theory was proved useful for many chemical phenomena, even though it was controversial at times. Some predictions were conflicted with what chemists had thought, and were difficult to approve experimentally. They waited until the 1980s to see if this experiment was confirmed.

Melvin Calvin

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Melvin Calvin was born April 8, 1911 in Saint Paul, Minnesota. His parents were Russian emigrant; his father's name is Elias Calvin, and his mother's name is Rose Herwitz. He attended the University of Minnesota in 1935 and the Michigan Technological University in 1931. He is married to Genevieve Jemtegaard, and they had three children together; two daughters, Elin and Karole, and one son, Noel. Calvin died January 8, 1997 in Berkeley, California.

He received the Nobel Prize in 1961 for his discovery of chemical pathways in photosynthesis. He earned his bachelor's degree in 1931 and his doctorate in 1935. He was the first person to use a carbon-14 tracer to show a chemical pathway.He also designed the Laboratory of Chemical Biodynamics, also known as the "Roundhouse" or "Calvin Carousel". He received many honorary degrees from the U.S. and foreign universities.

Hans Krebs

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Sir Hans Adolf Krebs was born August 25, 1900 in Hildesheim, Germany. His parents' are Georg Krebs and Alma Davidson Krebs. Hans enrolled in Germany at the University of Göttingen. He married Margaret Cicely Fieldhouse in 1938 and they had three children; two sons, Paul and John, and one daughter, Helen.

At the University of Freiburg (1932), Krebs discovered chemical reactions of ammonia that is converted to urea in mammals' tissues. He demonstrated the existence of chemical reactions that combines sugar breakdown and later showed to be an "activated" for of two-carbon acetic acid. Krebs also served on the faculty of the University of Oxford from 1954 to 1967. He wrote the Energy Transformations in Living Matter in 1957 and coauthored Reminiscences and Reflections with Anne Martin in 1981.