
Concept explainers
Interpretation: The number of unique amino acid sequences for a tripeptide with amino acid; gly, ala and cys with the condition of each amino acid occurring only once in each molecule needs to be determined.
Concept Introduction: Proteins are
These amino acids are involved in condensation process to form peptides and polypeptides, which further form complex protein molecules. Amino acids are the organic molecules with both

Answer to Problem 8A
- Gly-Ala−Cys
- Gly-Cys-Ala
- Ala−Gly-Cys
- Ala-Cys-Gly
- Cys-Gly-Ala
- Cys-Ala-Gly
Explanation of Solution
The given amino acids can combine in different combinations of amino acids to give unique tripeptide. In a tripeptide, 3 amino acids combine through peptide linkage. There are total 6 possible combinations with 3 amino acids in such a way that no amino acid will repeat.
- Gly-Ala−Cys
- Gly-Cys-Ala
- Ala−Gly-Cys
- Ala-Cys-Gly
- Cys-Gly-Ala
- Cys-Ala-Gly
- Gly-Ala−Cys
- Gly-Cys-Ala
- Ala−Gly-Cys
- Ala-Cys-Gly
- Cys-Gly-Ala
- Cys-Ala-Gly
Chapter 21 Solutions
World of Chemistry, 3rd edition
- Would the following organic synthesis occur in one step? Add any missing products, required catalysts, inorganic reagents, and other important conditions. Please include a detailed explanation and drawings showing how the reaction may occur in one step.arrow_forwardPls help.arrow_forward13) When solid barium phosphate is in equilibrium with its ions, the ratio of barium ions to phosphate ions would be: a. 1:1 b. 2:3 c. 3:2 d. 2:1 14) The pH of a 0.05 M solution of HCl(aq) at 25°C is 15) The pH of a 0.20 M solution of KOH at 25°C isarrow_forward
- Pls help.arrow_forwardPls help.arrow_forward16) A 2.0 L flask containing 2.0 x 10-3 mol H2(g), 3.0 x 10-3 mol Cl2(g), and 4.0 x 10-3 mol HCl(g) at equilibrium. This system is represented by the following chemical equation: H2 (g) + Cl2 (g) → 2HCl(g) Calculate the equilibrium constant for this reaction.arrow_forward
- 7) The pH of a 0.05M solution of HCl(aq) at 25°C is a. 1.3 b. 2.3 c. 3.3 d. 12.7arrow_forward11) The Ksp expression for copper (II) sulfate is: a. [Cu2+][SO4²¯] b. [Cu²+]² [SO4²]² c. [Cu²+]²[SO4²] d. [CuSO4] 12) Which of the following is true about a chemical system in equilibrium? a. All chemical reactions have stopped b. The concentration of reactants is equal to the concertation of products c. The forward and reverse reaction rates become equal d. The system will remain at equilibrium regardless of any external factorsarrow_forward21) Explain the difference between the rate of a reaction and the extent of a reaction. Why are both of these concepts important, if you are a chemical engineer that is trying to develop a process to produce a large volume of a specific type of chemical compound?arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY





