Lesson 1 Key Questions 1. Mg2+ has 10 electrons 2. Given that the half life of the radioisotope carbon -14 is 5730 years‚ it would not be useful in dating bones that are over a million years old. After 40 000 years of age less than 1% of the 14C is left in the bone and thus it is not useful for determining the exact age beyond that. 3. Hydrolysis - A chemical reaction where a chemical is broken down by a reaction with water. Hydrolysis is important for the digestion of food‚ making
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routes‚ respectively. Since its commercialization in the 1950’s by DuPont‚ PET was predominantly synthesized out of DMT due to the fact that this monomer‚ compared to TPA‚ was relatively easily purified by distillation. Yet‚ since the 1960’s‚ purified TPA became available by the development of new technologies and gained a lot of importance as a monomer in polyester synthesis (Matsuzawa‚ K.‚ 1976). The applications for PET include fibres and filaments‚ films‚ and bottlegrade chips. Modem plants are
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Polymers are chains of monomers (atom or a small molecule that has the potential of chemically binding to other monomers of the same species) which link in various fashions (e.g. cross-link‚ linear linking) to form materials that are used constantly to help humanity’s comfort and existence thrive. An important innovation of chemical advances is a material known as Hydrogels. What are Polymers and Why Use Carbon and Silicon Atoms? Polymers are repeating chains of monomers (atoms) which link in
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partially branched. | B. | Starch is a polymer of glucose. | C. | Starch is formed by the condensation of monomers. | D. | The properties of starch are very similar to those of cellulose. | E. | Starch may be digested by people. | Answer choice E Which of the following characteristics distinguishes carbohydrates from other macromolecule types? A. | Carbohydrates are constructed of monomers that always have a ring structure. | B. | Carbohydrates never contain nitrogen. | C. | Carbohydrates
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Unit 1 – Introduction to the Cell Robert Hooke – built the first microscope (30x magnification); viewed slices of cork called cellula (little rooms). Antoni Van Leeuwenhoek - worked with glass huge improvement in quality of lenses nearly 300x magnification became possible first to observe: * single-celled organisms “animalcules” * protists from pond water * bacteria from his mouth – “father of microbiology” * blood cells * banded pattern in muscle cells * sperm from
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partially natural. Most plastics are derived from propylene‚ a simple chemical component of petroleum. When heated up in the presence of a catalyst‚ individual chemical units monomers of propylene link together by forming extremely strong carbon-carbon bonds with each other. This results in polymers long chains of monomers called polypropylene. This content of plastic makes it hard to degrade On top of the list of alternatives for plastics that we currently use ‚ is the Bioplastic which is one of
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level. If our blood becomes acidic or basic this buffer neutralizes conditions. 4) C6H12O6+6O2-->6CO2+6H2O a) Carbon atoms in glucose are being oxidized b) Oxygen is being reduced Unit 1 Lesson 2 Key Questions 5)a) Carbohydrates monomer(s) is monosaccharide’s which are simple sugars. The functional groups of carbohydrates are carbonyl and hydroxyl. The linkage type is a
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Biology Honors Final Exam Review Study Guide A. Intro Unit * Characteristics of life (DR.CHARGE) * DNA * Directs protein synthesis * Reproduce * Divides in mitosis (asexual reproduction) * Cells * Homeostasis * The process by which cells maintain constant internal condition (water‚ temperature) * Adaptation (Evolution) * Respond to stimulus * Growth (Development) * Energy * Heterotroph: an organism that cannot synthesize its own food
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procedure with a starting monomer ratio of 70:20:10 of L-LA‚ GL and Ɛ-CL respectively using the catalyst tin(II)2-ethyl hexanoate. The chemical reaction is given in the figure1. The yield % of the synthesized polymer was calculated by the equation: Yield %= (Weight of synthesized polymer)/(Weight of the monomers taken) ×100 Characterization of synthesized polymer: Chemical analysis using Fourier transform infrared Spectroscopy: Fourier transform infrared (FTIR) spectrum of monomers and synthesized PLGC
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early atmosphere - earth roughly 4 billion yrs old - created by volcanoes erupting + releasing gases - contained mostly co2 + water vapour - earth cooled + water vapour condensed to form oceans - co2 dissolved into oceans + used to form marine organism shells which were compacted to form sedimentary rock - plants evolved to photosynthesise‚ takingin co2 + releasing oxygen - scientists don’t kno where all nitrogen came from bc they weren’t there to record evidence but most theories suggest
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