Homework Answers
Lysine has one stereocenter ( carbon). The
chiral center forms when the molecule binds with four different
groups.
The Leucine (leu) side chain does not form hydrogen bonds with other amino acids. It is hydrophobic. The other amino acids such as Alanine, Isoleucine, Methionine, Phenylalanine, Valine, Proline and Glycine which are also hydrophobic and are in the core of the protein.
Serine (Ser), threonine (Thr), asparagine (Asn), tyrosine (Tyr), glutamine (Gln), histidine (His) and cysteine (Cys) all these are polar amino acids.
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Which three statements about amino acids are true? Use this chart of amino acid structures for...
The chemical structures of the 20 standard amino acids at pH 7, along with their 3...
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...
repulsion within the protein 10. Which of the following amino acids do not contain a chiral...
repulsion within the protein 10. Which of the following amino acids do not contain a chiral carbon? a. Proline b. Alanine c. Glycine d. Phenylalanine e. Tyrosine 11. You want to determine an amino acid sequence for a particular polypeptide. So you degrade the peptid and get the following fragments. Determine the peptide sequence. Digested with typsin: Met-Val-Ser-Thr-Lys Val-lle-Trp-Thr-Leu-Met-lle Leu-Phe-Asn-Glu-Ser-Arg Digested with chymotrypsin: Asn-Glu-Ser-Arg-Val-lle-Trp Thr-Leu-Met-lle Met-Val-Ser-Thr-Lys-Leu-Phe a. Val-lle-Trp-Thr-Leu-Met-lle-Leu-Phe-Asn-Glu-Ser-Arg-Met-Val-Ser-Thr-Lys b. Val-lle-Trp-Thr-Leu-Met-lle-Met-Val-Ser-Thr-Lys-Leu-Phe-Asn-Glu-Ser-Arg c. Leu-Phe-Asn-Glu-Ser-Arg-Met-Val-Ser-Thr-Lys-Val-lle-Trp-Thr-Leu-Met-le d. Met-Val-Ser-Thr-Lys-Leu-Phe-Asn-Glu-Ser-Arg-Val-le-Trp-Thr-Leu-Met-lle e. Met-Val-Ser-Thr-Lys-Val-lle-Trp-Thr-Leu-Met-lle-Leu-Phe-Asn-Glu-Ser-Arg
Which of the following amino acids can form hydrogen bonds through their sidechain groups? Select one: a. Threonine b. P...
Which of the following amino acids can form hydrogen bonds through their sidechain groups? Select one: a. Threonine b. Phenylalanine c. Proline d. Methionine e. Glycine
A tRNA's anticodon is 5'GGC3! What amino acid is attached to it? Second base Uud Phenyia...
A tRNA's anticodon is 5'GGC3! What amino acid is attached to it? Second base Uud Phenyia UA Tyrosine (Tyr) UAA Stop codon WA G Stop codon Yad Cysteine (Cys) (UGTA Stop codon (WE ) Tryptophan (Tip) MUG Leucine (Leu) CES Prol CA Histidine (is) EAG Gutamine (G) Arginine (Arg) First base Third base AAAsparagine AAC (Asn) soleucine (llo) Methionine (Met) IACA start codon Threonine (Thr) AG Serine (Ser) AG Arginine (Arg) AUG AAA Lysine (Lys) SAU Aspartic acid GAC (Asp)...
Considering the side chain of each of the amino acids at pH 7.4, is that amino acid classified at neutral, basic, or ac...
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
Which of the following amino acid side chains can form hydrogen bonds with each other?
Which of the following amino acid side chains can form hydrogen bonds with each other? Isoleucine Leucine Glutamic acid Aspartic acid Lysine Asparagine Arg & Leu Val & Asn Asn & Ser Ser & Val Val & lle
questions e-f and g.and k. a) Use the 3 letter symbols for a 6 amino acid...
questions e-f and g.and k.
a) Use the 3 letter symbols for a 6 amino acid peptide chain containing at least one polar and at least one acidic or basic amino acid. (All at physiological pH.) Asp - Gly-Glu-Tyr- Phe- Ala OM b) Draw the primary structure with its peptide bonds, side chains, etc. in the correct order. CH3 NH - E-N -CH. - CH - C- 2-I U=0 -ch- & N-chi- CH₃ CH ₂ Coo CH н My Coo...
1. Which is a true statement about amino acids? a. They are amphiprotic b. The a-carbon...
1. Which is a true statement about amino acids? a. They are amphiprotic b. The a-carbon has an ester attached c. They are symmetrical d. They are planar e. The α-carbon has a phosphate group attached 2. Which is an incorrect statement regarding the side chains of amino acids? a. Tryptophan, tyrosine, and phenylalanine contain an aromatic group. b. Isoleucine, and leucine are isomers of each other. c. Lysine and methionine contain an amine group. d. Threonine, serine, and tyrosine...
HO HO но CASCHILOH HO-CACHS CH-OH * thr Use these structures to answer the questions below:...
HO HO но CASCHILOH HO-CACHS CH-OH * thr Use these structures to answer the questions below: HO H₂Ñ¢ão H₂N-d.co H₂N-d.co H₂N-d.co- CH₂C-oh asp ser J.S 0.5 a. Which amino acid is most polar? acp b. Which amino acid is least polar? c. Which amino acid is the most polar looking only at thr and ser? d. Which amino acid is the least polar looking only at asp and glu? Use these structures to answer the questions below: HO HO H₂N-¢&o....
Amino Acids SW C2 9. Which of the following is an L-amino acid? çoo coo coo...
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...
repulsion within the protein 10. Which of the following amino acids do not contain a chiral carbon? a. Proline b. Alanine c. Glycine d. Phenylalanine e. Tyrosine 11. You want to determine an amino acid sequence for a particular polypeptide. So you degrade the peptid and get the following fragments. Determine the peptide sequence. Digested with typsin: Met-Val-Ser-Thr-Lys Val-lle-Trp-Thr-Leu-Met-lle Leu-Phe-Asn-Glu-Ser-Arg Digested with chymotrypsin: Asn-Glu-Ser-Arg-Val-lle-Trp Thr-Leu-Met-lle Met-Val-Ser-Thr-Lys-Leu-Phe a. Val-lle-Trp-Thr-Leu-Met-lle-Leu-Phe-Asn-Glu-Ser-Arg-Met-Val-Ser-Thr-Lys b. Val-lle-Trp-Thr-Leu-Met-lle-Met-Val-Ser-Thr-Lys-Leu-Phe-Asn-Glu-Ser-Arg c. Leu-Phe-Asn-Glu-Ser-Arg-Met-Val-Ser-Thr-Lys-Val-lle-Trp-Thr-Leu-Met-le d. Met-Val-Ser-Thr-Lys-Leu-Phe-Asn-Glu-Ser-Arg-Val-le-Trp-Thr-Leu-Met-lle e. Met-Val-Ser-Thr-Lys-Val-lle-Trp-Thr-Leu-Met-lle-Leu-Phe-Asn-Glu-Ser-Arg
A tRNA's anticodon is 5'GGC3! What amino acid is attached to it? Second base Uud Phenyia UA Tyrosine (Tyr) UAA Stop codon WA G Stop codon Yad Cysteine (Cys) (UGTA Stop codon (WE ) Tryptophan (Tip) MUG Leucine (Leu) CES Prol CA Histidine (is) EAG Gutamine (G) Arginine (Arg) First base Third base AAAsparagine AAC (Asn) soleucine (llo) Methionine (Met) IACA start codon Threonine (Thr) AG Serine (Ser) AG Arginine (Arg) AUG AAA Lysine (Lys) SAU Aspartic acid GAC (Asp)...
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
questions e-f and g.and k.
a) Use the 3 letter symbols for a 6 amino acid peptide chain containing at least one polar and at least one acidic or basic amino acid. (All at physiological pH.) Asp - Gly-Glu-Tyr- Phe- Ala OM b) Draw the primary structure with its peptide bonds, side chains, etc. in the correct order. CH3 NH - E-N -CH. - CH - C- 2-I U=0 -ch- & N-chi- CH₃ CH ₂ Coo CH н My Coo...
1. Which is a true statement about amino acids? a. They are amphiprotic b. The a-carbon has an ester attached c. They are symmetrical d. They are planar e. The α-carbon has a phosphate group attached 2. Which is an incorrect statement regarding the side chains of amino acids? a. Tryptophan, tyrosine, and phenylalanine contain an aromatic group. b. Isoleucine, and leucine are isomers of each other. c. Lysine and methionine contain an amine group. d. Threonine, serine, and tyrosine...
HO HO но CASCHILOH HO-CACHS CH-OH * thr Use these structures to answer the questions below: HO H₂Ñ¢ão H₂N-d.co H₂N-d.co H₂N-d.co- CH₂C-oh asp ser J.S 0.5 a. Which amino acid is most polar? acp b. Which amino acid is least polar? c. Which amino acid is the most polar looking only at thr and ser? d. Which amino acid is the least polar looking only at asp and glu? Use these structures to answer the questions below: HO HO H₂N-¢&o....
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...
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