Concept explainers
(a)
Interpretation: The net charge on arginine in a high-
Concept introduction: In the solid state and also in solution,
(b)
Interpretation: The net charge on glutamic acid in a high-
Concept introduction: In the solid state and also in solution,
(c)
Interpretation: The net charge on glutamine in a high-
Concept introduction: In the solid state and also in solution,
(d)
Interpretation: The net charge on alanine in a high-
Concept introduction: In the solid state and also in solution,
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EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- Write the structure, identify the R groups and describe the chemical properties of these amino acids. A. Alanine B. Serine C. Sucrosearrow_forwardDescribe the levels of structure of a protein and tell how they would be affected by: a. Hydrolysis with 6M HCl (breaks peptide bond)b. Heating with mercaptoethanol (breaks hydrogen bonds)arrow_forwardClassify each of the following amino acid as polar or nonpolar. If polar, indicate if the R group is neutral, acidic, it basic. Indicate if each is hydrophobic or hydrophilic. a. lysine b. arginine c. methionine d. tyrosinearrow_forward
- For the following amino acids: Isoleucine and Tyrosinea. Draw its complete protonic equilibria. Indicate the net charge of each form and encircle the zwitterionic form. Provide labels (A, B, C, etc.) for each form. b. Calculate the IpH of the amino acid. c. At what pH range(s) it can act as a buffer? d. What will be the predominant form(s) of the amino acid at pH (i) 1.5; (ii) 3.0; (iii) 4.5; (iv) 6.0; (v) 7.5 and (vi) 9.0?arrow_forwardSelect the term in column B which best matches the description in column A. There are more terms then needed. Column A Column B 1. The pentose sugar found in DNA. a) Cis fatty acid b) Trans fatty acid c) Coenzyme d) Cofacipr 2. Commonly referred to as "insoluble fiber". 3. Considered to be an amphipathic molecule. 4. A molecule with the formula C18H3602 is probably a e) Phospholipid 5. Bond created during the formation of the primary structure of a protein. ) Glycogen 6. A non-protein organic molecule needed for proper enzyme functioning. g) Cellulose 7. Pyrimidine base found only in RNA. h) Galactose i) Fructose 8. Increasing the number of these molecules in the cell membrane would increase the permeability of the cell membrane. i) Thymine k) Uracil 9. Bond which connects nucleotide monomers together. 1) Fatty acid m) Disaccharide n) Peptide bond o) A-Helix p) B-Pleated Sheet q) Ribose r) Deoxyribose 10.arrow_forwardIndicate whether each of the following amino acids is polar: a. lysine b. tyrosine c. leucine d. asparagine e. proline f. cysteine g. glutamic acid h. valine i. histidine j. glycinearrow_forward
- Using the amino acid phenylalanine, draw and specify the nature of each following tertiary structure interactions between:a. two cysteinesb. arginine and glutamic acidc. isoleucine and tyrosinearrow_forwardDraw 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. argininearrow_forwardWhich of the following amino acids contains a carboxamide side chain? A.glutamine B.alanine C.isoleucine D.asparagine E.methioninearrow_forward
- Which of the following is a drawback of using base hydrolysis during amino acid composition? A. Protonation of basic amino acids. B. Dissociation of acidic amino acids. C. Denaturation of the protein. D. Racemization of certain amino acids.arrow_forwarda) A solution of amino acid having carboxylic side chain was titrated against NaOH. If initial pH of the solution was 2.8. Describe the state of the functional groups of the amino acid at the initial pH and at 10.5.b) Briefly explain how you will separate amino acids mixture using the charge difference between the amino acids.arrow_forwardA mixture of Alanine (pl 6.02), Glutamic Acid (pl 3.22), Glycine (pl 5.79), Lysine (pl 9.74) and Threonine (pl 6.53) are separated by anion exchange chromatography. What is the order of elution of these amino acids if you use gradient buffer system from pH 10 to pH 2 ? v First 1. Alanine v Second 2. Glutamic Acid v Third 3. Glycine 4. Lysine v Fourth 5. Threonine v Fifth 6. No separationarrow_forward
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