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Which of the following amino acids has a side chain with an ionizable proton and can...
Considering the side chain of each of the amino acids at pH 7.4, is that amino acid classified at neutral, basic, or acidic? Neutral Basic Acidic Answer Bank Leu histidine Thr H3C-c-coo TOOC-CH2-c-COO NH3 NH3 glutamate H2N-C-CH2-C-Coo NH3
Considering the side chain of each of the amino acids at pH 7.4, is that amino acid classified at neutral, basic, or acidic? Neutral Basic Acidic Answer Bank Leu histidine Thr H3C-c-coo TOOC-CH2-c-COO NH3 NH3 glutamate H2N-C-CH2-C-Coo NH3
1) Which of the following is an amino acid? A) e R-CH-CH2-C00R -CH-CooR -CH-C-CO ile R-CH-C-NH3 R-C=CH-Coo NH3 NH3 NH3 ONH 3 D) coo B) E) 2) Which of the following amino acids has a sulfur in the R group? A) serine B) cysteine C) asparagine D) tyrosine E) leucine 3) Which of the following terms describes the side chain of valine? A) acidic B) basic C) charged, polar D) uncharged, polar E) nonpolar 4) Which of the following is...
17. Which of these amino acids has a thiol group as part of its side chain? a. cysteine tyrosine Aca histidine threonine e: alanine 18. Which structure correctly represents an amino acid zwitterion? C- OH. NH R CH C- OH NH, NH R- CHHC OH NH NH
Which of the following amino acids will be retained longest in the column when separated by cation-exchange chromatography? H 1. Serine HO-CH2-C-COO® IV. Lysine NH H3N-CH2CH2CH2CH2CH -COOH NH H H V. Phenylalanine -CH--COOH NH II. Alatine Chy-d-coop H II. Cysteine HS-CH -¢-Coo® NH О О О О О IV V
Identify the kind of chemical catalysis and then identify which of the given amino acids can act as a catalyst for the reaction. HN-C-Coo H ¢-Coo HN— _—-coo MN -COOHN- -c coo histidine glutamic acid serine methionine lysine O că-oá D D HOH glutamic acid serine lysine histidine methionine caro Сх OH , Which amino acid would catalyze the reaction? The reaction is an example of acid-base catalysis covalent catalysis O glutamic acid O serine lysine histidine O methionine metal...
Amino Acids SW C2 9. Which of the following is an L-amino acid? çoo coo coo HẠN |-R HANH, HẠN –H HÀNH R coo B. 10. The following questions refer to the structures A-E below: (a) Which represents the structure of an amino acid at very high pH? (b) Which is a zwitterion? (c) Which represents the structure of an amino acid at very low pH? (d) Which structure/(s) is/are) not possible? R-CH-COOR-CH-COOH R-CH-COOH R-CH-COOR -CH-COO NH2 NH2 *NH NH2...
The chemical structures of the 20 standard amino acids at pH 7, along with their 3 and 1 letter codes, are givern in alphabetical order below. While the oxygen and nitrogen atoms of the peptide bonds may serve as a donor atom to complex a metal ion, very often the ligands for the metal come from the amino acid side chains. Takea few moments to examine the chemical structures of the different side chains. Circle the side chains that you...
19) The form of dipeptide aspatylserine (Asp-Ser) obtained from two amino acids, aspartic acid and serine, whose structures are shown here, is HiN-CH-C-0HIN-CH-C-0 CH2 CH OH aspartic acid serine A HN-CH-C-o-N-CH-C-o CH OH CH2 coo -(H-C-o-H-c-o CH OH CH2 HIN CH-C-N-CH-C-O CH OH CH H-CH-CH CH CH OH coo- 20) Where is the peptide bond located in this dipeptide? serine valine a) the CO-NH joining serine and the valine b) the doubly bonded oxygen just left of center between the...
6. Indicate the stereoisomer of the following amino acids: coo -NH3 н- R соо "н,N- -H 7.What number of amino acids were used to form this oligopeptide? NH2 он NH Он 8. What is the R group of alanine? Use IUPAC nomenclature to refer to R group as a substituent.