The following data show the amount of energy impinging on Earth in different forms. A. Only...
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The following data show the amount of energy impinging on Earth in different forms. A. Only a small fraction of the sun s energy is ultraviolet light (less than 2500 nm). What is the rest of the solar energy? Source Total radiation from sun Ultraviolet light Wavelength <2500 nm Wavelength <2000 nm Wavelength <1500 nm Electric discharges Cosmic rays Radioactivity Volcanoes Energy (cal cmyr) 260,000 570 85 3.5 4 0.0015 0.8 0.13 B. The molecules CH4, H₂O, NH3, and CO₂ absorb light at wavelengths less than 2000 nm. What fraction of total solar radiation is in this range? C. Instead of electric discharges, what other sources of energy could be used in these experiments? INVESTIGATION FIGURE 2.16 Synthesis of Prebiotic Molecules in an Experimental Atmosphere. With an increased understanding of the atmospheric conditions that existed on primitive Earth, the researchers devised an experiment to see if these conditions could lead to the formation of organic molecules. BELGRAMAGNOSE HYPOTHESIS Organic chemical compounds can be generated under conditions similar to those that existed in the atmosphere of primitive Earth. METHOD Heat a solution of simple chemicals to produco an atmos phere, Heat RESULTS Source Total radiation from sun Ultraviolet light Wavelength <2500 nm Wavelength <2000 nm Wavelength <1500 nm Electric discharges Cosmic rays. Atmospheric compartment Radioactivity Volcanoes Oceanic compartment 570 85 H₂O №₂ Nha Hy 3,5 45 0.0015 0.8 0.13 SE CONCLUSION The chemical building blocks of life could have been generated in the probable atmosphere of early Earth. HAMARKADANKED IN ANALYZE THE DATA CADERN The following data show the amount of energy impinging on Earth in different forms. Energy (cal cm2 yr A. Only a small fraction of the sun s energy is ultraviolet light (less than 260,000 2500 nm). What is the rest of the solar energy? CH₂ CO₂ Cold water Electrical sparks simulating lightning provide energy for synthesis of new compounds. A condonsor cools the atmospherio gases in a rain containing new compounds. Tho compounds collect In an ocean. Condensation Collect and analyze condensed Squid. Reactions in the condensed liquid eventually formed organic chomical compounds, including purines, pyrimidines, and amino acids. B. The molecules CH4, H₂O, NH3, and CO₂ absorb light at wavelengths less than 2000 nm. What fraction of total solar radiation is in this range? C. Instead of electric discharges, what other sources of energy could be used in these experiments? For more, go to Working with Data 2.1 at yourBioPortal.com. Go to yourBioPortal.com for original citations, discussions, and relevant links for all INVESTIGATION figures. The following data show the amount of energy impinging on Earth in different forms. A. Only a small fraction of the sun s energy is ultraviolet light (less than 2500 nm). What is the rest of the solar energy? Source Total radiation from sun Ultraviolet light Wavelength <2500 nm Wavelength <2000 nm Wavelength <1500 nm Electric discharges Cosmic rays Radioactivity Volcanoes Energy (cal cmyr) 260,000 570 85 3.5 4 0.0015 0.8 0.13 B. The molecules CH4, H₂O, NH3, and CO₂ absorb light at wavelengths less than 2000 nm. What fraction of total solar radiation is in this range? C. Instead of electric discharges, what other sources of energy could be used in these experiments? INVESTIGATION FIGURE 2.16 Synthesis of Prebiotic Molecules in an Experimental Atmosphere. With an increased understanding of the atmospheric conditions that existed on primitive Earth, the researchers devised an experiment to see if these conditions could lead to the formation of organic molecules. BELGRAMAGNOSE HYPOTHESIS Organic chemical compounds can be generated under conditions similar to those that existed in the atmosphere of primitive Earth. METHOD Heat a solution of simple chemicals to produco an atmos phere, Heat RESULTS Source Total radiation from sun Ultraviolet light Wavelength <2500 nm Wavelength <2000 nm Wavelength <1500 nm Electric discharges Cosmic rays. Atmospheric compartment Radioactivity Volcanoes Oceanic compartment 570 85 H₂O №₂ Nha Hy 3,5 45 0.0015 0.8 0.13 SE CONCLUSION The chemical building blocks of life could have been generated in the probable atmosphere of early Earth. HAMARKADANKED IN ANALYZE THE DATA CADERN The following data show the amount of energy impinging on Earth in different forms. Energy (cal cm2 yr A. Only a small fraction of the sun s energy is ultraviolet light (less than 260,000 2500 nm). What is the rest of the solar energy? CH₂ CO₂ Cold water Electrical sparks simulating lightning provide energy for synthesis of new compounds. A condonsor cools the atmospherio gases in a rain containing new compounds. Tho compounds collect In an ocean. Condensation Collect and analyze condensed Squid. Reactions in the condensed liquid eventually formed organic chomical compounds, including purines, pyrimidines, and amino acids. B. The molecules CH4, H₂O, NH3, and CO₂ absorb light at wavelengths less than 2000 nm. What fraction of total solar radiation is in this range? C. Instead of electric discharges, what other sources of energy could be used in these experiments? For more, go to Working with Data 2.1 at yourBioPortal.com. Go to yourBioPortal.com for original citations, discussions, and relevant links for all INVESTIGATION figures.
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Fundamentals of biochemistry Life at the Molecular Level
ISBN: 978-0470547847
4th edition
Authors: Donald Voet, Judith G. Voet, Charlotte W. Pratt
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