Homework Answers
The side chain of alanine is -CH3 (marked in red). It is neutral at pH 7 and is a non polar amino acid (CH3 isnon polar)
Alanine is a hydrophobic non polar amino acid.
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Question 2 (1 point) Amino acids can be classified as A. Hydrophobic amino acids with nonpolar...
Even though hydrophobic amino acids tend to be buried in the interior of a globular protein,...
Even though hydrophobic amino acids tend to be buried in the interior of a globular protein, polar neutral and polar charged amino acids are found in the interior of a globular protein as well. Recall Figure 4.26 of myoglobin. To see how this can happen, consider a model of a generic globular protein (below). The side chains of only seven of the amino acids are shown. 5. "DH" is a side chain that is a hydrogen bond donor "A" is...
PDX-1 must bind to DNA in order to function. A particular arrangement of amino acids with...
PDX-1 must bind to DNA in order to function. A particular arrangement of amino acids with polar r-groups determines the sequence of nitrogenous bases the PDX-1 can bind to via hydrogen bonds; however, a separate binding pocket of the protein helps it attach to the DNA backbone. What would you predict the characteristics of those amino acids are? Positively Charged Polar Uncharged Negatively Charged Nonpolar
Answer the following questions based upon a tripeptide sequence with the following amino acids: S L...
Answer the following questions based upon a tripeptide sequence with the following amino acids: S L D Serine Leucine Aspartate a) What is the overall charge of the most abundant tripeptide species at neutral pH (pH 7.0)? b) At physiological pH, what is the best desciption of the chemical properties of the side chain of each amino acid? options are: hydrophobic, polar uncharged, negativelly charged, and positively charged c) What is the overall charge of the most abundant tripeptide...
Lecture 3 Identify amino-/carboxy termini, and R-group on amino acid What is chirality? Identify a carbon...
Lecture 3 Identify amino-/carboxy termini, and R-group on amino acid What is chirality? Identify a carbon that is chiral (i.e., has 4 different groups attached) Chiral compounds rotate plane polarized light Memorize amino acid 1) structure, 2) classification (hydrophobic, aliphatic, aromatic, negatively charged, positively charged, polar uncharged) Be able to draw glycine (the generic amino acid) Given an amino acid structure and pKas of ionizable groups, be able to determine the charge at pH 1, pH 14, and pH 7...
For the following amino acids - explain why the overall charge on the amino acid is...
For the following amino acids - explain why the overall charge on the amino acid is different at PH's 2, 7, and 11. Relate it to the pk, of the groups on the molecules To achieve distinction, you must explain that the form of an amino acid, whether positively charged, negatively charged or neutral, depends on the pH of the solution and also on the Ka of the acid group
An αlpha- helix is formed by hydrogen bonds between: a. nonpolar and polar R groups. b....
An αlpha- helix is formed by hydrogen bonds between: a. nonpolar and polar R groups. b. positively charged and negatively charged R groups. c. the carbonyl oxygen and the amide nitrogen of neighboring amino acids. d. the carbonyl oxygen and the amide nitrogen of every fourth amino acid.
2. Using the reference pk values provided below (assuming that pk values can be applied to...
2. Using the reference pk values provided below (assuming that pk values can be applied to ionazable R groups in peptides) a) Draw the complete structure of the peptide IDKSMH that exists at physiological pH 7.4 b) What is the charge of the peptide at pH 7.4? c) What is the charge of the peptide at pH 10? PR, es pkk ) Rougl Amino acid COOH) Nonpolar, aliphatic Rgroups Glycine Alanine Proline Valine 1.99 10.98 Loucine 236 2.35 921 8.13...
Question 1 (1 point) Amino acids used in proteins generally are L-amino acids neither L nor...
Question 1 (1 point) Amino acids used in proteins generally are L-amino acids neither L nor D amino acids both L and D amino acids D-amino acids Question 2 (1 point) o be Polar R groups, along with acidic and basic R groups are said Question 2 (1 point) Polar R groups, along with acidic and basic R groups, are said to be.because the are attracted to water molecules. hydrophobic hydrophilic ionized unreactive Question 3 (1 point) Which of the...
Constants ! Periodic Part A Explain why amino acids, unlike most amnines and carboxylic acids, are...
Constants ! Periodic Part A Explain why amino acids, unlike most amnines and carboxylic acids, are insoluble in diethyl ether. O An amino acid is insoluble in diethyl ether (a relatively nonpolar solvent), because an amino acid exists as a nonpolar molecule. In contrast, carboxylic acids and amines are more polar because they have a single charge depending on the extent of dissociation in diethyl ether An amino acid is insoluble in diethyl ether (a relatively nonpolar solvent), because an...
Can someone help me understand on how to determine the amino acids nonpolar, uncharged polar, or...
Can someone help me understand on how to determine the amino
acids nonpolar, uncharged polar, or charged polar? Thank you!
Review Topics] Referer Classify the two amino acids below according to their effective polarity in proteins at pH-7.4 n Nonpolar up Uncharged polar ep Charged polar HN 1. Polarity N-Methylarginine (unnatural) HN он 2. Polarity Tyrosine (Tyr or ) HN Retry Entire Group 6 more group attempts remaining Submit Answer
Even though hydrophobic amino acids tend to be buried in the interior of a globular protein, polar neutral and polar charged amino acids are found in the interior of a globular protein as well. Recall Figure 4.26 of myoglobin. To see how this can happen, consider a model of a generic globular protein (below). The side chains of only seven of the amino acids are shown. 5. "DH" is a side chain that is a hydrogen bond donor "A" is...
Lecture 3 Identify amino-/carboxy termini, and R-group on amino acid What is chirality? Identify a carbon that is chiral (i.e., has 4 different groups attached) Chiral compounds rotate plane polarized light Memorize amino acid 1) structure, 2) classification (hydrophobic, aliphatic, aromatic, negatively charged, positively charged, polar uncharged) Be able to draw glycine (the generic amino acid) Given an amino acid structure and pKas of ionizable groups, be able to determine the charge at pH 1, pH 14, and pH 7...
For the following amino acids - explain why the overall charge on the amino acid is different at PH's 2, 7, and 11. Relate it to the pk, of the groups on the molecules To achieve distinction, you must explain that the form of an amino acid, whether positively charged, negatively charged or neutral, depends on the pH of the solution and also on the Ka of the acid group
2. Using the reference pk values provided below (assuming that pk values can be applied to ionazable R groups in peptides) a) Draw the complete structure of the peptide IDKSMH that exists at physiological pH 7.4 b) What is the charge of the peptide at pH 7.4? c) What is the charge of the peptide at pH 10? PR, es pkk ) Rougl Amino acid COOH) Nonpolar, aliphatic Rgroups Glycine Alanine Proline Valine 1.99 10.98 Loucine 236 2.35 921 8.13...
Question 1 (1 point) Amino acids used in proteins generally are L-amino acids neither L nor D amino acids both L and D amino acids D-amino acids Question 2 (1 point) o be Polar R groups, along with acidic and basic R groups are said Question 2 (1 point) Polar R groups, along with acidic and basic R groups, are said to be.because the are attracted to water molecules. hydrophobic hydrophilic ionized unreactive Question 3 (1 point) Which of the...
Constants ! Periodic Part A Explain why amino acids, unlike most amnines and carboxylic acids, are insoluble in diethyl ether. O An amino acid is insoluble in diethyl ether (a relatively nonpolar solvent), because an amino acid exists as a nonpolar molecule. In contrast, carboxylic acids and amines are more polar because they have a single charge depending on the extent of dissociation in diethyl ether An amino acid is insoluble in diethyl ether (a relatively nonpolar solvent), because an...
Can someone help me understand on how to determine the amino
acids nonpolar, uncharged polar, or charged polar? Thank you!
Review Topics] Referer Classify the two amino acids below according to their effective polarity in proteins at pH-7.4 n Nonpolar up Uncharged polar ep Charged polar HN 1. Polarity N-Methylarginine (unnatural) HN он 2. Polarity Tyrosine (Tyr or ) HN Retry Entire Group 6 more group attempts remaining Submit Answer
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