Concept explainers
(a)
Interpretation: The name of the standard amino acids that have side chains with the given characteristic has to be stated.
Concept introduction: Amino acid is a compound that is composed of
(b)
Interpretation: The name of the standard amino acids that have side chains with the given characteristic has to be stated.
Concept introduction: Amino acid is a compound that is composed of
(c)
Interpretation: The name of the standard amino acids that have side chains with the given characteristic has to be stated.
Concept introduction: Amino acid is a compound that is composed of
(d)
Interpretation: The name of the standard amino acids that have side chains with the given characteristic has to be stated.
Concept introduction: Amino acid is a compound that is composed of
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EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- How many carbon atoms are present in the R group in each of the following standard amino acids? Please see picture. Thank you!arrow_forwardDraw the structures of the 20 standard amino acids and give their one- and three letter abbreviations.arrow_forwardConsider the R groups of amino acids glycine, asparagine, and tyrosine. Note: Reference the Naturally occurring amino acids data table for additional information.arrow_forward
- Which of the following statements is true about amino acids? a. All twenty (20) of these protein-derived amino acids are a-amino acids, meaning that the amino group is located on the carbon alpha to the carboxyl group. b. For nineteen (19) of the twenty (20) amino acids, the a-amino group is primary. Glycine is different; its a-amino group is secondary. c. With the exception of proline, the a-carbon of each amino acid is a chiral center. As shown in Table 27.1, all 19 chiral amino acids have the same relative d. Both a & carrow_forwardLook at Table 18.3 and identify the type of noncovalent interaction expected between the side chains of the following pairs of amino acids:(a) Glutamine and serine (b) Isoleucine and proline(c) Aspartate and lysine (d) Alanine and phenylalaninearrow_forwardWhich among the 20 standard amino acids has more than one chiral carbon? Draw its structure and indicate with asterisk the second chiral carbon. Is it polar or non-polar? Is it essential or non-essential?arrow_forward
- Name and draw the structure of two charged amino acidsarrow_forwardOne or more of the compounds shown below will satisfy each of the following statements. Not all compounds may be used; some may be used twice. Put the number(s) in the blank. (1) Found in chitin. (2) An L-saccharide. (3) The first residue attached to asparagine in N-linked glycans. (4) A uronic acid. (5) A ketose. CH,OH CoO COO OH H H H H ОН Н но OH OH H OH H HO OH H NHC- CH, Oso, OH (a) (b) (c) CH,OH CH,OH CH,OH C=0 CHOH C=0 H-C- OH CH,OH но -с-н ČH,OH CH,OH (d) (e)arrow_forwardIn the image below, there are the structures of two amino acids. Which of them has an R-group that is hydrophilic? A) Both #1 and #2 B) Neither amino acid has a hydrophobic R-group C) #2 D) #1 .arrow_forward
- The common amino acids are polyprotic acids. All amino acids contain an amino group and a carboxyl group. Some amino acids contain ionizable side chains. The presence of an ionizable side chain creates a third ionizable group. For a diprotic amino acid such as glycine (structure shown below), three forms are possible. These forms, the fully protonated (AA*), single deprotonated (AA°), and completely deprotonated (AA) exhibit different acid-base properties. NH;+ NH,+ NH, Neutral H,A (AA+) A- (AA•) (AA-) The Ka describing the AA* and the AA° equilibrium is 4.57 x10-3, while the Ka involving AA° and the anionic form AA- is a much smaller 2.51 x 10-10, The neutral form, AA° is referred to as isoelectric glycine. All amino acids can assume the isoelectric form under proper conditions. a. Calculate the pH of a 0.1 M solution prepared from the salt glycine hydrochloride (hint: use ICE table).arrow_forwardFor each of the following amino acids: 1) describe what the important functional group of the amino acid side chain is, 2) identify the charge of the side chain, 3) name another component in the structure that the amino acid might interact with, and 4) indicate how the interaction with the component listed in 3) might be occurring (i.e., electrostatic interaction, hydrogen bond, hydrophobic interaction, etc.) a) Asp153 b) Arg166 c) Lys167arrow_forwardWhat type of intermolecular forces mainly exist between the side chains of each of the following pairs of amino acids? Select the single best answer for each part below. Note: Reference the Naturally-occurring amino acids table for additional information. Part 1 of 3arrow_forward
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