Given the following information about amino acid tyrosine answerquestions 1 & 2:A.OHHOOH HOHOрказ 10.1HNH₂CH₂OHA.NH3С. НО1. Which of the above forms of tyrosine will be predominant in a solution withpH 9.5?2. Which of the above forms of tyrosine is a cation?Answers to Questions 3 & 4 should be selected from the following choices:CH₂OHHollOOHB.NH₂pka2 9.01conj acidOHВ. НО"OHD. HOHOHOH pka1 2.2OH-OHCH₂OHC.NH3HONH₂OHOOHD.3. Which of the monosaccharides above is a non-reducing sugar?4. Which of the monosaccharides above is an aldotetrose?5. What is the main functional group in a protein?||||OH

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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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The aromatic side chain of Trp residues in proteins and peptides can be chemically modified by two photochemical reactions using ultraviolet light (hv) at 20°C (Figure 1). hv CCI3CO₂H (10 mm), Buffer A (pH 8.0) O HO HN HN- O A. Acidic NH ww O B. Basic O c. Hydrophobic O D. Polar neutral OB. Indole NH ww Figure 1 Photochemical reactions of Trp side chain with CHCl3 and CCI₂CO₂H O A. Imidazole Each substitution on Trp replaces one hydrogen atom attached to a carbon somewhere on the indole ring. Photochemical modification percentages of various Trp residues in carbonic anhydrase at 20°C are shown in Table 1. Table 1 Photochemically Modified in Carbonic Anhydrase Reactant Buffer W4 W15 W96 W122 W190 W207 W243 51% 0% 44% A 37% 0% 0% CHCI 3 0% CHCI₂ B 0% 0% 0% 0% 0% 0% 55% CCI,CO₂H A 72% 66% 0% 100% 100% 0% 75% O c. Pyrimidine OD. Pyrrole hv W15 and W96, which are in the interior of carbonic anhydrase, are 21% and 29% modified respectively by 10 mM CHCl3 in Buffer A at 75°C, a temperature…
Indicate the net charge of cysteine at pH 9.5 Express your answer using two significant figures.
A synthetic amino acid has an ionizable side change (-OH) with a pKa of 6.54. Determine the isoelectric point for the amino acid. The other pKa values are 2.87 and 9.14. A. 6.54 B.7.84 C.6.00 D.4.71
The structure of the dipeptide Gly-Asn is given by . The structures of the amino acids Gly and Asn are given below. NH2 H. ČH2 H3N-C-CO H. H3N-C-CO H. Asn Gly NH2 CH2 H H H2 C COO 2. H3N-C -C H. 1. H&N C C-NH C COO NH, NH2 CH2 H. H2 C C NH2 3. H3N-C C- -C COO 4. 0OC-C NH3" Click Save and Submit to save and submit. Click Save All Ansuwers to save all answers. MacBook Air esc 吕0 DII DD F1 F2 F3 F4 F5 F6 F7 F8 F9 @ 2$ & 1 2 4 5 7 8 Q W E R Y | A S D F G K C V N M < CO # 3 HICH
Which of the following is true regarding proteins A. Absorbance of proteins is directly proportional to the molecular weights B.Proteins react with biuret reagent because of their side chains C. two out of the twenty amino acids can absorb at 280nm D. In proteins the average weight per amino acid residue always varies
30. The shown structure is a cyclic D-monosaccharide. Which of the following statements is true? HOCH₂ H OH H OH OH CH₂OH A. The chemical can react with methanol to form a hemiacetal in solution without forming an open chain structure B. The chemical needs to form an open chain structure to be able to react with methanol to produce a glycosidic linkage in solution C. Both A and B D. Neither A nor B
Which of the following amino acids can interact via ionic/electrostatic interactions with lysine at physiologic pH 7.4?a. Histidineb. Asparaginec. Glutamate
Which of these amino acids is a polar, uncharged amino acid? (Select all that apply, if necessary.) A. B. D. E. CHLO H₂N-CH-C CH₂ CH₂ CH₂ NH C=NH2 NH₂ amino acid A amino acid C amino acid D amino acid B amino acid E H₂N-CH-C CH₂ _i_g C. H₂N-CH-C- CH2₂ I CH₂ =0 NH₂ H₂N-CH- CH₂ CH-CH3 CH3 H₂ND H₂N-CH- | CH₂ Ï OH
Answer questions for the following monosaccharide: H-C-OH НО —с —н H C-OH d. Draw the product if it were oxidized ([O]). Draw entire product. H -C-OH e. Convert & draw the beta anomer (Haworth structure). CH2OH
Define the following terms: a. eicosanoid b. omega-6 fatty acid c. omega-3 fatty acid d. trans fatty acid e. acyl group
Draw the L enantiomer in a Fischer projection for each amino acid; identify the amino acid as neutral, acidic, or basic. Give the three-letter sign [3], and the one-letter symbol [4].arginine a. arginine b. arginine c. a. glutamic acid b. glutamic acid c. glutamic acidtyrosine b. valine c. arginine
Classify the following lipid (choose all that apply).CHOOSE ALL THAT APPLY a. monounsaturated b. omega-6 c. triglyceride d. saturated e. steroid f. polyunsaturated g. omega-3 h. wax ester i. fatty acid

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