Update 2

UPDATE 2: HOW GLYPHOSATE WORKS

Original Paragraphs: 

Glyphosate kills plants by obstructing the synthesis of the essential amino acids phenylalanine, tyrosine, and tryptophan. These amino acids are referred to as “essential” due to the fact that animals cannot make them; only plants and micro-organisms can make them and animals acquire them by consuming plants.

Plants and microorganisms make these amino acids with an enzyme that only plants and lower organisms contain, called 5-enolpyruvylshikimate-3-phosphate-synthase (EPSPS). EPSPS isn’t present in animals, which instead acquire aromatic amino acids from their diet.

Key Points:

• Glyphosate is the ingredient in herbicide that kills plants by terminating a group of amino acids (protein) which are essential to plants as only they can produce them. 
• These amino acids are : phenylalanine, tyrosine and tryptophan, which are produced by an enzyme called 5-enolpyruvylshikimate-3-phosphate-synthase or also known as EPSPS.

Paraphrasing:

Phenylalanine structure
http://www.nootropicmind.com/wp-content
/uploads/2014/09/L-phenylalanine.png

The herbicide, Roundup as had previously been discussed has the active ingredient called glyphosate which are capable of eradicating plants but however could not differentiate between crops and weed, hence making the genetic modification of crops crucial. These glyphosate terminates a strand or group of amino acids, coding for even larger structure of proteins which are indispensable in plants. It includes phenylalanine, tyrosine and tryptophan. All these interrelated amino acids are crucial not only for plants but also for animals and human beings who are incapable of producing it. 

Plant Stomata
http://www.psmicrographs.co.uk/_assets/uploads
/lavender-leaf-stomata-80200158-m.jpg

Phenylalanine are indeed very significant because it is the key to flavonoid biosynthesis in plants, which is basically the chemical conversion in plants to ensure its survival. This includes pigments, protection against UV/ sunlight, nutrition transportation and multitude other aspects. Tyrosine or also known as tyrosine phosphatases is involved in regulating plants' stomatal movement, or in other words regulating the exchange of internal and external objects/ chemicals such as carbon dioxide or oxygen. The last amino acid, tryptophan, like phenylalanine also develops into multitude metabolites and chemicals in plants, making it a prominent factor in plant growth/ development.

*Information from paraphrasing does not solely come from the source of 'original paragraphs'.

Bibliography:

"Roundup Ready Soybean." - Genetically Modified Organisms Reference Library. N.p., n.d. Web. 15 Oct. 2014. <http://www.redorbit.com/education/reference_library/science_1/genetically_modified_organisms/1112964747/roundup-ready-soybean/>.

Wikipedia. Wikimedia Foundation, n.d. Web. 15 Oct. 2014. <http://en.wikipedia.org/wiki/Phenylalanine#In_plants>.

Ferreyra, María L. Falcone, Sebastián P. Rius, and Paula Casati. "Abstract."National Center for Biotechnology Information. U.S. National Library of Medicine, 28 Sept. 2012. Web. 15 Oct. 2014. <http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3460232/>.

"Characterisation of the Tryptophan Synthase Alpha Subunit in Maize." BMC Plant Biology. N.p., n.d. Web. 15 Oct. 2014. <http://www.biomedcentral.com/1471-2229/8/44>.

Sheng, Luan. "Tyrosine Phosphorylation in Plant Cell Signaling." Skip to Main Page Content Research on the Interactions between Natural and Social Systems, and with How Those Interactions Affect the Challenge of Sustainability. Science Sessions: The PNAS Podcast Program. Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, n.d. Web. 15 Oct. 2014. <http%3A%2F%2Fwww.pnas.org%2Fcontent%2F99%2F18%2F11567.full>.

"Stomata." Stomata. N.p., n.d. Web. 14 Oct. 2014. <http://www.eoearth.org/view/article/156262/>.