10. According to the ability to be synthesized in the human body the proteinogenic amino acids can be divided on: essential, non-essential and semi-essential. Choose the essentialamino acid from the following:A. GlutamineB. PhenylalanineC. ProlineD. SerineE. Tyrosine17:2653

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Answered: 10. According to the ability to be sy…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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A 100 mL solution of 0.1 M amino acid (AA) at pH 1.0 was titrated with 1.0 M NaOH solution. The pH was monitored, and the results were plotted on a graph, as shown below. The key points in the titration are designated I to VII. 12 12 II 1097 VI 8. V pH 6 4 39. 120 2 IV 0.5 1.5 2.5 Equivalents of OH
Number 7
A patient is suffering from hemoglobinopathies and the principal biochemical defect that leads to the development of Hb c involves the substitution of at the sixth position of the b-polypeptide chain: a. Proline replaced by cysteine b. Phenylalanine replaced by lysine c. glutamate replaced by Lysine d. glutamic acid replaced by alanine ->
9. In E. coli the synthesis of phosphatidylethanolamine directly involves: acyl carrier protein. biotin. CDP-choline. phosphatidylglycerol. serine.
A1
1. In a table form, give the proteins involved in body iron sensing and hepcidin production. For the first column: proteins; second column: locations and third column: functions.
The ff. are neutral amino acids, except: ●A. methionine O B. lysine ● c. threonine O D. non of these 49
VI. Although most biologically relevant sugars have the D-configuration, L-fucose is a commonly observed monosaccharide component in glycoproteins. Glycosylated antibodies (IgGs) observed in patients with active TB have more fucose than those found in patients with latent TB (Lu et. al., 2016). Latent TB occurs when a person has the TB bacteria, but bacterial proliferation is kept under control by the body's immune system; hence, the infected person is asymptomatic and not infectious. A person with latent TB will test positive for the tuberculin test or TB blood test. a) L-fucose is also known as 6-deoxy-L-galactose. Note that D-galactose is a C-4 epimer of D-glucose. Draw the Fisher projections for D-glucose, D-galactose and L-fucose. (Hints: D- and L-isomers are enantiomers. 6-deoxy means that the hydroxyl group at C-6 is removed leaving just the methyl group). D-galactose: D-glucose: L-fucose (6-deoxy-L-galactose): b) L-fucose can cyclize into a pyranose and form two anomers. Draw…
4. Show exactly which peptide bonds you would expect trypsin to cleave if you set a digest with the sample below. H3N+Gly Y lle Yval YCys Giu Gin Ala (Ser Yal Pro Cys Asp Leu Arg (Lys Phe Tyr) Asn FCO0- Lys Thr Leu Y His Would you expect to form the same peptides in the trypsin digest if you pretreat this sample with reducing agent (for example DDT)? Explain
1.) Propose the biosynthesis of 5-methylorsellinic acid: CH3 НО. CH3 `CO,H OH
3 i. Define Biological Value (BV) of Proteinsii. What are the advantages of this protein evaluation method when compared to Nbalance and chemical score?5iii. A bull consumes 7 kg DM of feed containing 60 g N/kg. The bull excretes 120 g N inthe faeces and 50 g N in the urine. The feacal and urinary N had 20 g metabolic feacalnitrogen (MFN) and 6 g endogenous urinary nitrogen (EUN) respectively.Calculate the BV of the protein in the diet.
Transmission is: O A. conversion of amino acid to hydroxyl acid B. loss of ammonia from amino acids O c. formation of ammonium salt from ammonia OD. conversion of amino acids to keto acids 21

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10. According to the ability to be sy nthesized in the human body the p roteinogenic amino acids can be di vided on: essential, non- essential and semi- essential. Choose the essential amino acid from the following: A. Glutamine B. Phenylalanine C. Proline D. Serine E. Tyrosine 17:26