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Thymine is one of the heterocyclic bases found in DNA. Do you expect thymine to be
aromatic? Explain
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- In the structures of T—A and C—G base pairs, there are three amino groups specifically labeled as “sp2 hybridized and planar”. What is the primary difference between these structures and that of aniline that lead to their planarity? 1. In contrast to aniline, the amino groups on the DNA bases are necessary to make the heterocyclic rings aromatic. 2. In contrast to aniline, the contributing structures that delocalize the nitrogen lone pairs onto the rings creates partial negative charges on electronegative atoms. 3. In contrast to aniline, the hydrogen bond accepting ability of the lone pairs on the -NH2 groups of the DNA bases is better when these amino groups are sp2 hybridized. 4. Both 2 and 3.10) All six molecules shown below are examples of...Highlight/bold your answer. See pp. 71-73 of your text for help. Nucleic Acids or Carbohydrates or Lipids or Proteins (1) (2) (3) (4) (5) (6) HO CH,OH H-C-CH HO-C-H H-C-CH H-C-CH CH,OH OH H-C-OH C=0 H-C-OH HO-C-H H-C-CH H-C-OH CH,OH H-C-OH H--CH -OH a. Based on the molecules you see above, list at least two structural characteristics that are common to all carbohydrates. b. Based on the molecules you see above, list at least three ways that carbohydrates can differ from one another.The pH scale measures... ..the concentration of salt the concentration of hydrogen ions. ..the strength of conjugate base all of the above Non Reducing sugars form osazone crystals when heated with an excess of phenylhydrazine HCI TRUE O FALSE Which of the following reagent differentiates monosaccharide hexoses from pentoses? O Phenyl Hydrazine in HCI Bial's Orcinol test Mucic acid test Seliwanoff's test
- The above amino acid, shown at pH = 7.0 and where every atom (including hydrogens!) is visible, is (D or L) -X-This is a homework question... In nature, amino acids in proteins are typically found in the L-configuration. This is basedon it’s relationship to D- and L-glyceraldehyde. Shown below is the structure of the amino acidasparagine (Asn) at physiological pH. As written does histidine have an L(S)- or D(R)-configuration? Be sure to show how you derived your answer:The final four questions will require you to determine whether the compound in question will partition into the organic or aqueous phase. Which layer will phenylalanine partition into? Note: look up "zwitterions" water diethyl ether
- Does tartaric acid has meso form? Explain with reasons.43. Specify expressions specific to panaxosides. I. taken from ginseng II. there are glucose and arabinose monosaccharides in this compound III. taken from Japanese angelica-tree IV. tetratcyclic triterpen saponins V. spirostanol type glycoside VI. dimer structure VII. biglycosides VIII. dammaran group IX. differ for number of hydroxyl groups X. furostanol type glycoside A) II; VI; VII; IX; X B) III; V; VIII C) I; IV; VIII; IX D) I; VIII; IX E) I; III; V; VII; VIII; XSuppose you start with Gly fixed to the substrate. Call this R1-COO- where the R1 stands for the solid substrate and all of Gly except the carboxylic acid group. Draw the resultant molecule(s) when Ala is allowed to react with the R1-COO-.