ChemActivity 46ACA46AOverview of Amino Acids and Proteins(What does it mean for a protein to be denatured?)Model 1: General structure of an a-amino acid in acidic, neutral, or basic solution.The building blocks of proteins are a-amino acids, small molecules that contain acarboxylic acid and an amino group. The amino group is connected to the carbon next to theproboxyl group, designated the & carbon. There are 20 different amino acids found heproteins,only in the side chain ("R group").OR-CH-C-OHNH3 +basic (high pH)acidic (low pH)Amino acids contain both a carboxylic acid (proton donor) and a basic amino group (protonacceptor). The neutral "zwitterionic" form is commonly found in aqueous solutions with a pHnear neutrality. The side chain "R" may be one of 20 choices.a. at low pH: -NH₂ or -NH3+b. near neutral pH: -NH₂ or -NH3*c. at high pH: -NH₂ or -NH3*3. Circle the correct ionization state of a carboxyl groupa. at low pH: -COOH or -COO-b. near neutral pH: -COOH or -COO™c. at high pH: -COOH or -COO-R-CH-C-O-CH-CNH3*neutralCritical Thinking Questions:1. Identify the a-amino group and the carboxyl group in each structure in Model 1. Ensureall team members agree.2. Circle the correct ionization state of an amino groupa. Valine; in the stomach at pH 1.5НЗС.CH3CH4. Using Model 2 (on the following page) to help you, draw the structure of the indicatedamino acid as it would commonly exist under the given conditions. Charges areimportant.+NH3OOCOHOOCc. Glutamate; in the blood plasma at pH 7.4coooCH2CH2R-CH-C-0-TNH₂b. Serine; in the small intestine at pH 10SHоос-(+)246CHÍNHCHCHNH2

Answer is given below from model 1 related questions, due to absence of model 2 answers are not…

(What does it me Model 1: General structure of an a-amino acid in acidic, neutral, or basic solution. The building blocks of proteins are a-amino acids, small molecules that contain a carboxylic acid and an amino group. The amino group is connected to the carbon next to the carboxyl group, designated the a carbon. There are 20 different amino acids found in proteins, differing only in the side chain ("R group"). R-CH-C- -CH-C NH₂ basic (high pH) acidic (low pH) neutral Amino acids contain both a carboxylic acid (proton donor) and a basic amino group (proton acceptor). The neutral "zwitterionic" form is commonly found in aqueous solutions with a pH near neutrality. The side chain "R" may be one of 20 choices. R-CH-C-OH T NH3 + R-CH-C-0 1 NH3 Critical Thinking Questions: 1. Identify the a-amino group and the carboxyl group in each structure in Model 1. Ensure all team members agree. 2. Circle the correct ionization state of an amino group a. at low pH: -NH₂ or -NH3* b. near neutral pH: -NH₂ or -NH3* c. at high pH: -NH₂ or -NH3* 3. Circle the correct ionization state of a carboxyl group a. at low pH: -COOH or -COO b. near neutral pH: -COOH or -COO™ c. at high pH: -COOH or -COO-

(What does it me Model 1: General structure of an a-amino acid in acidic, neutral, or basic solution. The building blocks of proteins are a-amino acids, small molecules that contain a carboxylic acid and an amino group. The amino group is connected to the carbon next to the carboxyl group, designated the a carbon. There are 20 different amino acids found in proteins, differing only in the side chain ("R group"). R-CH-C- -CH-C NH₂ basic (high pH) acidic (low pH) neutral Amino acids contain both a carboxylic acid (proton donor) and a basic amino group (proton acceptor). The neutral "zwitterionic" form is commonly found in aqueous solutions with a pH near neutrality. The side chain "R" may be one of 20 choices. R-CH-C-OH T NH3 + R-CH-C-0 1 NH3 Critical Thinking Questions: 1. Identify the a-amino group and the carboxyl group in each structure in Model 1. Ensure all team members agree. 2. Circle the correct ionization state of an amino group a. at low pH: -NH₂ or -NH3* b. near neutral pH: -NH₂ or -NH3* c. at high pH: -NH₂ or -NH3* 3. Circle the correct ionization state of a carboxyl group a. at low pH: -COOH or -COO b. near neutral pH: -COOH or -COO™ c. at high pH: -COOH or -COO-

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter21: Organic And Biological Molecules

Section: Chapter Questions

Problem 145CP

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