4. Write the Edman degradation technique used for the sequencing of proteins
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- 1)What is the objective of hydrolyzing the RNA prior to doing biochemical tests? 2) What particular test, other than Molisch's, may be performed to determine the presence of pentose sugar? Create a process. 3) List the sugars, purines, and pyrimidine bases found in DNA and RNA and write down their structural formulae.1. What is the purpose of hydrolyzing the RNA before conducting biochemical tests? 2. Enumerate the sugar component, purine, and pyrimidine bases present in DNA and RNA and write their structural formulas1.Draw these phosphorylated structures as they would be connected in a polinucleotide (e.g.RNA) in the order A-B. / Show how they combine to form the polynuleotide (i.e. only the end product). Show at any one of these structures where the glycosidic bond occurs 2.Sanger sequencing revealed the sequence of an oligonucleotide to be: d-AGATGCCTGACT. Draw a diagram of the gel banding pattern post capillary electrophoresis i.e. where on the gel would the fragments feature
- 1- Biochemist Erwin Chargaff was the first to note that, in DNA, [A] = [T] and [G] = [C], equalities now called Chargaff’s rule. With the use of this rule, determine the percentages of all the bases in a DNA molecule which contains 35% thymine. Explain. 2- Similar equalities (i.e. [A]=[U] and [G]=[C]) are however not observed in RNA molecules. Explain the structural differences which dictate why Chargaff rule does not apply to RNA polynucleotides.1. Why do we need to check the isolated DNA for its quantity and quality? 2. The purity of DNA sample is below 1.8 A260/A280 so, where did the proteincontamination come from? Note: Cite the in-text citation and referencesIn the given segment 3 ’ C A G T T A C G G C T C C T A G G T T A T A A T T C G T T T C 5 ’ Illustrate and indicate the direction of the synthesis of: i. a 5-nucleotide RNA primer ii. a 5-nucleotide Okazaki fragment
- 1. Use the info of this molecule as well as the attached addendum to demonstrate the flow of genetic information to protein sequence as described by the so-called “Central Dogma” . Clearly indicate the direction of your polynucleotide strands and peptide/protein. ATG GCA TGC AAT AGC TCA TGC 2. What would happen to the amino acid sequence if the underlined nucleotide (C) would change to an A?6a) Transcribe the following DNA sequence into codons. TACGCGACATTACATGAATCGTTTGGAGATTAGCCCTATTTCTCTAAGAACACGACTb) Excise(cut out) codons numbered 5, 6, and 7. Leave the remaining codons. c) Now translate the sequence . d) Explain how many amino acids are now in your polypeptide? e) What would happen to your polypeptide if either of your cysteine amino acids near the start or end of thepolypeptide were translated incorrectly. f) Based on your final polypeptide can you make the original DNA strand by doing reverse translation andtranscription? g) Explain if your polypeptide similar to your template strand or the complementary strand?1. Suppose a protein sample with a fragment containing the following amino acid sequence is subjected to various chemical assay/tests. - Ala-Gly-Trp-Phe-Met-Cys- What is observed when the protein sample is subjected to Millon’s test? Violet interface Red precipitate/solution Brown/black precipitate Yelllow product No observable result 2. Suppose a protein sample with a fragment containing the following amino acid sequence is subjected to various chemical assay/tests. - Ala-Tyr-Trp-Phe-Cys-Gly - What is observed when the protein sample is subjected to lead sulfide test? Violet interface Red precipitate/solution Brown/black precipitate Yelllow product No observable result
- 1) most STR fragments used in human forensic analysis are comprised of_____ repeatsWhat can we most-accurately say about the polypeptide with the primary sequence KNEADING? a.It has two acidic R groups b.It has three basic R groups c. It has two nonpolar neutral R groups d. It contains three polar neutral R groups e. It contains a disulfide linkage1. Draw the structure of the polyribonucleotide UAGCCUG. 2. Draw the structure of the polydeoxyribonucleotide CGTAGAT.