CHM376_Fa22_PS4

OH and COOH are Functional groups . That should start at C1 but in problem 1.29 A and B the OH doesn’t start at C1 but in problem 1.30 A and B COOH does .. why the difference. I don’t understand

6. Is this amino acid L- or D-, and how can you tell? Н -ŅH3 CH3 a. D-, because all amino acids are D. b. D-, because the amine is on the right. c. D-, because the amine is on the left. d. L-, because the amine is on the left.

Classify these amino acids as acidic, basic, neutral polar, or neutral nonpolar using the dropdown on the right. NH3 CH₂ I CH₂ CH₂ I CH₂ H₂N-C-COO H Lysine Amino Acid A CH₂ CH₂ H₂N-C-COO H Glutamic Acid Amino Acid D Amino Acid B (Alanine) CH3 H₂N-C-COO Amino Acid A (Lysine) H Alanine Amino Acid B CH3 HCOH H₂N-C-COO H Threonine Amino Acid E Choose [Choose OH CH₂ H₂N-C-COO H Serine Amino Acid C CH3 CH3 CH H₂N-C-COO H Valine Amino Acid F

at a pH value of 2, the amino and carboxyl groups in an amino acid will exist as

Pick the FALSE statement: Since amino acids have functional groups that are strong acids, their structures depend on the pH of their environment. Cys has a sulfhydryl that can stabilize protein shape by forming noncovalent bonds. The R group in Ala is a methyl group. Aspartic acid and glutamic acid do not have amide groups. more than 1 of the above is false

Examine the structure of the following amino acid and answer the questions below: Name the amino acid. Does it exhibit optical activity? Why? Describe the acid-base properties of amino acids. What is zwitterion?

Draw an a amino acid with an isopropyl (-CH(CH3)2) Continue side chain. Click and drag to start drawing a structure. C с с X 3 官 cx Ć

The property of water solutions to conduct electric current is possible for all of the 20 standard amino acids. True or False?

I don't get it at all. I struggled with my homework. Can you help me about the Henderson-Hasselbalch relation, summarized in the table below, it is possible to predict the predominant form of these groups at a particular pH? Draw the line bond structure for the general form of an amino acid using "R" to represent the side chain. Draw the N- and C-terminus groups using the forms that are predominant at physiological pH (pH = 7.4. Include lone pairs in your drawing.

The bond angle around the nitrogen in a peptide bond is 122°. Amino terminos H 11 1119 R 120° 1.51 H AMINO ACID 1 116² 1.32 Peptide bond 122 What is the reason for this angle? 1.46 1.02 H H 1.09 R AMINO ACID 2 Carboxyl terminus Resonance causes nitrogen to have a mostly trigonal planar structure O b. The proton gets abstracted by dissociation, causing nitrogen to have only two substituents O c. This is the typical angle for a tetrahedron O d. The lone pair on the nitrogen causes a distortion of the sp3 hybrid

There are four amino acids shown in this problem: two are on this page, and two are on the following page. Only three of these amino acids are the "standard" amino acids shown in the table in the textbook. One of these is very similar to a standard amino acid, but its structure is a little bit different. Identify the three standard amino acids and give their name. Identity the non-standard amino acid. You do not have to give it a name, but you do have to (a) identify the standard amino acid to which it is most similar, and (b) describe as specifically as possible how it iş different.