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7. What do the study findings suggest to us about our overall question, "How should we search for life beyond Earth?"

7. What do the study findings suggest to us about our overall question, "How should we search for life beyond Earth?"

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Answer question 7 please
5. How do you think the physical properties (solubility in water conductivity, boiling & Melting points) of arsenic trichloride (AsCl,) would compare to those of phosphorus trichloride (PCI1? SYNTHESIZE Underneath the article is a "Note." Be sure to read it and answer these two questions. 6. This article got a huge amount of international attention. Why? What does it mean that scientists "could not replicate the findings?" 7. What do the study findings suggest to us about our overall question, "How should we search for life beyond Earth?" EXTEND 8. What are two or more elements scientists should investigate, which could substitute for two of the five other elements (0, C, H, N, S) we know to be essential for life? Explain your answer using patterns from the Periodic Table and Lewis Diagrams. 9. What would be a reason these substitutions might NOT happen?
Transcribed Image Text:5. How do you think the physical properties (solubility in water conductivity, boiling & Melting points) of arsenic trichloride (AsCl,) would compare to those of phosphorus trichloride (PCI1? SYNTHESIZE Underneath the article is a "Note." Be sure to read it and answer these two questions. 6. This article got a huge amount of international attention. Why? What does it mean that scientists "could not replicate the findings?" 7. What do the study findings suggest to us about our overall question, "How should we search for life beyond Earth?" EXTEND 8. What are two or more elements scientists should investigate, which could substitute for two of the five other elements (0, C, H, N, S) we know to be essential for life? Explain your answer using patterns from the Periodic Table and Lewis Diagrams. 9. What would be a reason these substitutions might NOT happen?
x Copy of SAS 1-11 - Go X Copy of 11.4 Readi Copy of 11.4 Reading X IM3 Desmos Activity BazOIYc-iSOOBC3Wzm7z2-CGittNfvx118hmpq4/edit mit. D (535) You Tube EdClub Math earch for Life Lesson 11: Reading - Using Arsenic Instead of Phosphorus NASA Scientists's Puzzling Discovery Adapted from A Bacterium That Can Grow by Using Arsenic Instead of Phosphorus and NASA Finds New life (Science, Wolfe-Simon et al., 2011) It is known that all life on Earth is composed of six elements: carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. But a team of scientists at NASA have made a surprising and puzzling discovery in Mono Lake, California in 2011. This discovery is being called "life as we do not know it" by NASA. The NASA scientists thought they found a bacterium able to substitute arsenic for phosphorus in some macromolecules, specifically lipids, nucleic acids, and proteins. In these macromolecules, arsenate can be found in the place of phosphate. While other elements have been found to substitute in living things, such as other metals replacing iron as the oxygen-carrying element in some organisms, this bacterium was thought to be the first living thing found to have a replacement for one of the six essential elements for life, This is not a perfect substitution. In laboratory experiments, arsenate was found in the bacterium only when bacteria were grown in an environment lacking in phosphorus. The arsenate ion (AsO,) is not as stable as the phosphate ion (PO,), arsenic is much more toxic than phosphate, and it is thought that some biological processes are not compatible with arsenic-substituted molecules. be a remarkable discovery. The existence of Despite the unknowns, this was still thought an organism on Earth that can substitute for one of the six essential elements would suggest that the search for life beyond Earth may not be limited to just those six elements. Note: This study could not be replicated after 2011, and other studies have found that there has indeed been phosphorus in the organisms in Mono Lake, indicating that the organisms are not including arsenic in their DNA. Reterences
Transcribed Image Text:x Copy of SAS 1-11 - Go X Copy of 11.4 Readi Copy of 11.4 Reading X IM3 Desmos Activity BazOIYc-iSOOBC3Wzm7z2-CGittNfvx118hmpq4/edit mit. D (535) You Tube EdClub Math earch for Life Lesson 11: Reading - Using Arsenic Instead of Phosphorus NASA Scientists's Puzzling Discovery Adapted from A Bacterium That Can Grow by Using Arsenic Instead of Phosphorus and NASA Finds New life (Science, Wolfe-Simon et al., 2011) It is known that all life on Earth is composed of six elements: carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. But a team of scientists at NASA have made a surprising and puzzling discovery in Mono Lake, California in 2011. This discovery is being called "life as we do not know it" by NASA. The NASA scientists thought they found a bacterium able to substitute arsenic for phosphorus in some macromolecules, specifically lipids, nucleic acids, and proteins. In these macromolecules, arsenate can be found in the place of phosphate. While other elements have been found to substitute in living things, such as other metals replacing iron as the oxygen-carrying element in some organisms, this bacterium was thought to be the first living thing found to have a replacement for one of the six essential elements for life, This is not a perfect substitution. In laboratory experiments, arsenate was found in the bacterium only when bacteria were grown in an environment lacking in phosphorus. The arsenate ion (AsO,) is not as stable as the phosphate ion (PO,), arsenic is much more toxic than phosphate, and it is thought that some biological processes are not compatible with arsenic-substituted molecules. be a remarkable discovery. The existence of Despite the unknowns, this was still thought an organism on Earth that can substitute for one of the six essential elements would suggest that the search for life beyond Earth may not be limited to just those six elements. Note: This study could not be replicated after 2011, and other studies have found that there has indeed been phosphorus in the organisms in Mono Lake, indicating that the organisms are not including arsenic in their DNA. Reterences
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