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H 2 SO 4
H 2 SO 4

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... 86. Briefly describe the processes of transcription and translation. 87. Explain why an RNA molecule is shorter than the DNA template from which it was transcribed. 88. Compare and contrast DNA and RNA. 89. Describe the role of the promoter in transcription. 90. Explain how transcription differs fro ...
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... Polysucrose™ 400 is a synthetic high molecular weight polymer made by the copolymerization of sucrose and epichlorohydrin. The molecules have a branched structure with a high content of hydroxyl groups giving a good solubility in aqueous solutions. The product is similar to Ficoll® 400 from GE Healt ...
Biological Molecules Review Questions 2015
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... 34. The major component of a plant cell wall is a product formed from the dehydration synthesis of A. fatty acids. B. nucleotides. C. amino acids. D. monosaccharides. 35. The main difference between cellulose and starch molecules is A. the type of linkage between glucose subunits. B. that only cellu ...
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... Methods 1. RNA extraction with Trizol Transferred the material to 1ml Trizol extraction buffer. Added chloroform, phenol:chloroform:isoamyl alcohol (25:24:1), isopropanol, and centrifuged the samples at 14,000rpm for 10 min at 6°Cin after each was added. ...
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Nucleic acid analogue



Nucleic acid analogues are compounds which are analogous (structurally similar) to naturally occurring RNA and DNA, used in medicine and in molecular biology research.Nucleic acids are chains of nucleotides, which are composed of three parts: a phosphate backbone, a pucker-shaped pentose sugar, either ribose or deoxyribose, and one of four nucleobases.An analogue may have any of these altered. Typically the analogue nucleobases confer, among other things, different base pairing and base stacking properties. Examples include universal bases, which can pair with all four canonical bases, and phosphate-sugar backbone analogues such as PNA, which affect the properties of the chain (PNA can even form a triple helix).Nucleic acid analogues are also called Xeno Nucleic Acid and represent one of the main pillars of xenobiology, the design of new-to-nature forms of life based on alternative biochemistries.Artificial nucleic acids include peptide nucleic acid (PNA), Morpholino and locked nucleic acid (LNA), as well as glycol nucleic acid (GNA) and threose nucleic acid (TNA). Each of these is distinguished from naturally occurring DNA or RNA by changes to the backbone of the molecule.In May 2014, researchers announced that they had successfully introduced two new artificial nucleotides into bacterial DNA, and by including individual artificial nucleotides in the culture media, were able to passage the bacteria 24 times; they did not create mRNA or proteins able to use the artificial nucleotides. The artificial nucleotides featured 2 fused aromatic rings.
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