Chemistry help asap! will give you upvote! 7. What is the isoelectric point of the following peptide? (pKa values are provided) -NH, 8.0 HyN -cO,H 3.0 OH sidechain 4.0 A. pl = 8.0 B. pl = 5.5 C. pl = 6.0 D. pl = 3.5 8. What is the correct description of the following peptide? H,N. A. Tripeptide B. Tetrapeptide C. Pentapeptide D. Polypeptide 9. What is the formal charge on the following peptide at pH = 5.0? group pKa -NH3 9.1 H2N OH -co,H 2.9 NH2 sidechain 8.3 A. -2 В. -1 C. 0 D. +1 E. +2

Chemistry help asap! will give you upvote! 7. What is the isoelectric point of the following peptide? (pKa values are provided) -NH, 8.0 HyN -cO,H 3.0 OH sidechain 4.0 A. pl = 8.0 B. pl = 5.5 C. pl = 6.0 D. pl = 3.5 8. What is the correct description of the following peptide? H,N. A. Tripeptide B. Tetrapeptide C. Pentapeptide D. Polypeptide 9. What is the formal charge on the following peptide at pH = 5.0? group pKa -NH3 9.1 H2N OH -co,H 2.9 NH2 sidechain 8.3 A. -2 В. -1 C. 0 D. +1 E. +2

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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The isoelectric point (pl) can best be calculated by: Averaging the sums of all pkas. Averaging the sum of the two pKas closest to physiological pH. Averaging the two pKas "sandwiching" the zwitterionic form. Averaging the two pKas of the alpha-amino and alpha-carboxy groups.
Which of these structure represents cysteine at pH=13
Enz-SH + Ag* - Enz-S-Ag + H* The affinity of Ag* for sulfhydryl groups is so great that Ag* can be used to titrate -SH groups quantitatively. To 10.0 mL of a solution containing 3.5 mg/mL of a pure enzyme, an investigator added just enough AGNO, to completely inactivate the enzyme. A total of 0.536 umol AGNO, was required. Calculate the minimum molecular weight (M,) of the enzyme. minimum M, = The determined M, is not exact, but it is a minimum value for the M, of the enzyme. Why does the M, value obtained this way give only the minimum molecular weight? There is only one polypeptide chain. There are no disulfide bonds in the protein. There is only one titratable -SH group per protein molecule. The Ag* would also react with the terminal carboxyl group.
d. réčombinants 20. What functional group is found on every amino acid not in a zwitterion form? a. -SH b. -NH, C. -C- d. -S-S- e. no correct response is given 21. The peptide linkage that bonds the monomers together in proteins is also corr
NH₂ 4. Draw the following peptides. You may use Kelule Formula or the Line-bond (or skeletal) Formula: a. Alanine-Glycine-Serine b. Phe-Tyr-Trp C. KMH 5. Briefly describe the following: a. Primary Structure b. Secondary Structure NH₂ c. Tertiary Structure d. Quaternary Structure 6. APPLICATION: For the following items, do some literature search to answer them: a. Sickle cell anemia is one of the disease that is caused by defects in protein structure. Briefly discuss the biochemical basis of sickle cell anemia. What level of protein structure does it affect? b. Thalassemias are caused by genetic defects that impair the synthesis hemoglobin causing anemia symptoms to people affected by it. Briefly discuss the biochemical basis of thalassemias. What level of protein structure does it affect?
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1 Submit Q10. !! Unanswered Q10. An average amino acid is about 110 Da (Daltons). If there are 1273 amino acids in the SARS-CoV-2 spike protein, what do you expect the mass of spike to be? How does that compare to the expected mass of about 200 KDa? more than expected by about 90 Da Less than expected by about 90 Da B. more than expected by by about 60 KDa less than expected by about 60 KDa Submit odf 0/11 answered
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Estimate the pl values of the following peptides: a. Ser-lle b. Gly-Tyr-Val
Modify isoleucine to show its structure at pH 1 and pH 13. Modify each amino acid by adding or removing atoms or bonds and by adding charges where appropriate. pH 1 pH 13 Select Draw Rings More Erase Select Draw Rings More Erase H N H N CH, CH, CH, CH, H,C - CH H,C - CH H,N C- 0 - H - H,N - C - C- 0 - H II H.
18.18-Enhanced - with Feedback 4. Reset Help peptide bond a carbon a carbon HN-CH CNH-CH- peptide bond CH2 CH,COO CH,CHCH, R group 418 P 71°F A O 10/10/2 hp