Monomers are atoms or small molecules that bond together to form more complex structures such as polymers.
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1 Monomers are atoms or small molecules that bond together to form more complex structures such as polymers. There are four main types of monomer, including sugars, amino acids, fatty acids, and nucleotides. Each of these monomer types play important roles in the existence and development of life, and each one can be synthesized abiotically. Monomers are commonly found in the interstellar medium, nebulae, and chondritic meteorites. stellar+space&source=bl&ots=5zgzzycp_l&sig=_fzwu4lj9mxlmgoe3xo0gva0p8&hl=en&ei=bkvbtnm9pizmsqomvu2wda&sa=x&oi=book_result&ct=r esult&resnum=2&ved=0cbyq6aewaq#v=onepage&q=monomers%20interstellar%20space&f=false
2 Amino Acids: The building blocks of protein. Amino acids are the monomers that build a polymer called protein. There are 20 amino acid monomers but they all have a general structure of: A Central Carbon (C) An Amino group (NH3) A carboxyl or acid (COO-) A Hydrogen (H The R group (20 different kinds)
3 Streker Synthesis Composed by Adolph Streker, it is a series of chemical reactions that synthesize an amino acid from aldehyde. Aminonitrile is formed from the aldehyde, ammonium chloride and potassium cyanide. It is then hydrolyzed to form an amino acid. ng
4 The Miller-Urey Experiment An apparatus built to simulate the conditions of early earth. Simple Amino Acids were generated such as glycine, glycolic acid and alanine. This led to some great discoveries in Chemical Evolution. Picture: /oct08/miller-urey-experiment.html Info: /lectures/9.html
5 Sugar Monomers: Glucose is the most common natural monomer. It links together to form polymers of Starch, Cellulose and Glycogen. Glucose also provides a vital source of energy for many organisms. oly.gif This slide by Johnnie French
6 DNA_thymineAndUracilCorrected.png This slide by Johnnie French
7 Formed in the laboratory by the formose reaction of formaldehyde H 2 CO in the presence of Calcium hydroxide (Ca(OH) 2 ), a strong base. Formaldehyde (the precursor to sugars) was probably synthesized photochemically in the early atmosphere,co 2 + 2H 2 H 2 CO + H 2 O. Formaldehyde is very soluble in water, so it is likely to have dissolved in rainwater after synthesis in the upper atmosphere. Calculations have shown that within 10 6 yrs enough H 2 CO would have formed to be actively reacting with UV light in solution. This slide by Johnnie French
8 This slide by Johnnie French mi.jpg
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10 Step 1: Fischer-Tropsch Reaction. Gaseous carbon passed over a hot catalyst such as powdered iron produces hydrocarbon chains, precursors to fatty acids Step 2: Photochemical reactions, esp. UV Step 3: Ferrous (iron-rich) clays react with CO 2 and H 2 O to produce organic acids which then adsorb onto clays. These complexes can then react to produce stable macromolecular precursors. This slide by Johnnie French
11 Jessica Supalla Nucleotides are monomers that join together to form the structural units of RNA and DNA, as well as providing an energy source in metabolism. Nucleotides are composed of a nucleobase, a five-carbon sugar (either ribose or deoxyribose), and one to three phosphate groups.
12 Jessica Supalla A nucleobase is one of the five basic nitrogen bases of DNA and RNA - Cytosine (C), Guanine (G), Adenine (A), Thymine (T), and Uracil (U). A phosphate is a salt containing phosphorus and oxygen linked to one or more alkyl or aryl molecule.
13 Jessica Supalla Juan Oró synthesized adenine by heating a hydrogen cyanide solution in aqueous ammonia for several days. (Archives of Biochemistry and Biophysics, Volume 94, Issue 2, August 1961, Pages ) Other experiments were performed over several years, including synthesis in a frozen medium. Each successful experiment demonstrated synthesis from a cyanide compound and ammonia. (ORIGINS OF LIFE AND EVOLUTION OF BIOSPHERES, Volume 32, Number 3, )
14 Monomers are atoms or small molecules that bond together to form more complex structures such as polymers. Each of these monomer types play important roles in the existence and development of life, and each one can be synthesized abiotically in the interstellar medium.
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