Open Sans 12 BIUA * 職 日 、 +] GO D bacterum can grow in the environment which has a laCK of phosphorus. in tris type of environment the bacteria uses arsenic instead of phosphorus. 2. Make a list of some facts in this article that relate to what we have studied so far. What We Learned Connections to our Chemistry Learning I learned that bacteria are able to substitute phosphorus with arsenic. It indicates that the chemistry of arsenic is approximately similar to most appropriate element is preferred. that of phosphorus as they have approximately the same size and same chemical properties. it indicates that the substitution of elements is done only when it is required.. otherwise the 5 it indicates that the stability of arsenate ion and phosphate ion is not equal.phosphate ion have more stability than than arsenate ion because as the size of phosphorus is small as compared to arsenic so it have high electron density and have high electronegativity than arsenic and phosphate ion is stabilized by hydrgen bonding also. It indicates that arsenic and phosphorus both elements of chemistry have equal importance in bectrium life. 3. Why might arsenic be able to substitute for phosphorus? Orronic ir ahle to suhstitute phosphorus because both have similar chemical properties.
Open Sans 12 BIUA * 職 日 、 +] GO D bacterum can grow in the environment which has a laCK of phosphorus. in tris type of environment the bacteria uses arsenic instead of phosphorus. 2. Make a list of some facts in this article that relate to what we have studied so far. What We Learned Connections to our Chemistry Learning I learned that bacteria are able to substitute phosphorus with arsenic. It indicates that the chemistry of arsenic is approximately similar to most appropriate element is preferred. that of phosphorus as they have approximately the same size and same chemical properties. it indicates that the substitution of elements is done only when it is required.. otherwise the 5 it indicates that the stability of arsenate ion and phosphate ion is not equal.phosphate ion have more stability than than arsenate ion because as the size of phosphorus is small as compared to arsenic so it have high electron density and have high electronegativity than arsenic and phosphate ion is stabilized by hydrgen bonding also. It indicates that arsenic and phosphorus both elements of chemistry have equal importance in bectrium life. 3. Why might arsenic be able to substitute for phosphorus? Orronic ir ahle to suhstitute phosphorus because both have similar chemical properties.
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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Please do question 5 for me and please don’t return in it just write one sentence for each box

Transcribed Image Text:Open Sans
-12
+BIUA.
GO D
* 職 15 ,
bacterium can grow in the environment which has a lack of phosphorus. in tris type of
environment the bacteria uses arsenic instead of phosphorus.
2. Make a list of some facts in this article that relate to what we have studied so far.
What We Learned
Connections to our Chemistry Learning
it indicates that the substitution of elements is
done only when it is required.. otherwise the
I learned that bacteria are able to substitute
phosphorus with arsenic. It indicates that the
chemistry of arsenic is approximately similar to most appropriate element is preferred.
that of phosphorus as they have approximately
the same size and same chemical properties.
5 it indicates that the stability of arsenate ion
It indicates that arsenic and phosphorus both
elements of chemistry have equal importance in and phosphate ion is not equal.phosphate ion
bectrium life.
have more stability than than arsenate ion
because as the size of phosphorus is small as
compared to arsenic so it have high electron
density and have high electronegativity than
arsenic and phosphate ion is stabilized by
hydrgen bonding also.
3. Why might arsenic be able to substitute for phosphorus?
Oronic ir ahle to substitute phosphorus because both have similar chemical properties.
ctrons

Transcribed Image Text:DivC-ISOOBC3WZM7Z2-CGittNfvx118hmpq4/edit
(535) You Tube
Ed Club
Math
n 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 substitutich. 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.
Despite the unknowns, this was still thought to be a remarkable discovery. The existence of
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.
References:
Diaz, J. (20 10, December 2). NASA Fints Nrw ufe. Giamoco. bi mn.cmnasa fintn te ated 041
Woite-Simor, F, et a (2011). A bactenum that can grow by using arsenic instead of phosphorus. Sclence. Retrieved july 27, 2020, from
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