“Amino acids used in making a polypeptide have an amino group and carboxyl group, and these...
“Amino acids used in making a polypeptide have an amino group and carboxyl group, and these groups can be present on any carbon atoms.” Is that a correct statement? Why so? What is the basis for classification of amino acids to non-polar (but not aromatic), polar, and two oppositely charged (at physiological pH) amino acids? Provide examples with their exact name, three letter and single letter codes.
Homework Answers
No, because the carboxyl group and amino group present on the alpha carbon only the it's help to make polypeptide chain.
Formation -co-nh2- peptide bonds.
Functional groups which have pure hydrocarbon alkyl group and aromatic group are generally non polar. Example valine(Val)V, leucine(Leu) L etc
Polar amino acids are those which are interested to dissolve in aqueous water due to hydroxyl group, carboxyl group ammonia group.Eg: serine(Ser)S, threonine(Thr)T
Histidine opposite charge at physiological ph.(His)H
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“Amino acids used in making a polypeptide have an amino group
and carboxyl group, and these...
1. What chemical features that are common to all living beings distinguishes living from non-living? Provide...
1. What chemical features that are common to all living beings distinguishes living from non-living? Provide specific examples for each feature. 2. Explain hydrophobic effect in terms of the laws of thermodynamics and what is required to generate such effect? How can you avoid hydrophobic effect? 3.“Amino acids used in making a polypeptide have an amino group and carboxyl group, and these groups can be present on any carbon atoms.” Is that a correct statement? Why so? What is the...
5. Which of the 20 standard amino acids are a. Cyclic b. Aromatic C. Sometimes charged...
5. Which of the 20 standard amino acids are a. Cyclic b. Aromatic C. Sometimes charged at physiological pH d. Technically not hydrophobic, polar, or charged e. Basic f. Acidic . Sulfur containing 6. Estimate the net charge of a His-His-His-His tetrapeptide at pH 6.0 7. The artificial non-nutritive sweetener aspartame is a dipeptide with the sequence Asp-Phe. The carboxyl terminus is methylated. Draw the structure of aspartame at pH 7.0. Sketch a titration curve for the amino acid cysteine,...
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...
Understand protonation and deprotonation of carboxyl and amino groups in amino acids Question Which of the following st...
Understand protonation and deprotonation of carboxyl and amino groups in amino acids Question Which of the following statements are NOT true regarding the ionization of nonacidic and nonbasic amino acids? Select all that apply: O The amino and carboxyl groups are both ionized at the isoelectric point. U The amino group will be ionized when the pH is above the isoelectric point. The carboxyl group will be ionized when the pH is below the isoelectric point. The amino group will...
Homework #11 (5 points) 1. Draw two amino acids. Circle around the carboxyl ends. Put a...
Homework #11 (5 points) 1. Draw two amino acids. Circle around the carboxyl ends. Put a double line und and the three-letter abbreviation for each amino acid. two amino acids. Circle the central carbon atoms. Underline the amino ends. Carboxyl ends. Put a double line under the R groups/ side chains. Write the name 2. How do enzymes increase the rate of chemical reactions? 3. What type of bond joins two amino acids together? 4. What are the three types...
Question 2 (1 point) Amino acids can be classified as A. Hydrophobic amino acids with nonpolar...
Question 2 (1 point) Amino acids can be classified as A. Hydrophobic amino acids with nonpolar R groups B. Polar amino acids with neutral R groups but the charge is not evenly distributed C. Positively charged amino acids with R groups that have positive charge at physiological pH. D. Negatively charged amino acids with R groups that have a negative charge at physiological pH. How would the amino acid alanine be classified? Think through your reasoning. L-Alanine H2N-CHC-OH CH3
Qa. Positively charged R group (i.e sidechain) at physiological pH (pH=7) *hint: looking for 2 a.a....
Qa. Positively charged R group (i.e sidechain) at physiological pH (pH=7) *hint: looking for 2 a.a. Qb. Aromatic R group (i.e. sidechain), hydrophobic (non-polar) and neutral at pH <14. *hint: looking for 2 a.a. Qc. The amino acids that have ionizable (i.e. chargeable) sidechains between 0<pH<14. *hint: looking for 7 a.a. listed in alphabetical order by first letter. Qd. State the functional groups and pKa values associated with the amino acid Glu.Answer should be entered as follows: group pKa; group...
help!! 15 Determine the pl (isoelectric point) for Arg (R). This could be a range of...
help!!
15 Determine the pl (isoelectric point) for Arg (R). This could be a range of values. For Q 18-20 list the amino acids that fall into each category. Include only the one-letter codes. 16 e Positively charged R group (i.e sidechain) at physiological pH (pH=7) *hint: looking for 2 a.a. Aromatic R group (.e. sidechain), hydrophobic (non-polar) and neutral at pH <14. *hint: looking for 2 a.a.
Fill in the blanks for each amino acid Amino Acid Properties Name of R-group Properties Amino...
Fill in the blanks for each amino acid
Amino Acid Properties Name of R-group Properties Amino Acid Type of Polarity pKa Charge at Special functional group pH-7 Properties (hn(wpp)amgies applicable) (whpee Alanine Arginine Asparagine Aspartate Carboxyl Polar 3.9 Sulfhydryl Polar N/A Forms S-S Glutamine Glutamate Histidine Isoleucine Lysine Methionine Phenylalanine Aromatic Non-Polar Absorbs G@ 280 nm N/A Proline Can be Serine Threonine Tryptophane Tyrosine Valine
From N to C terminus, name the amino acids in the polypeptide shown below using single-letter...
From N to C terminus, name the amino acids in the polypeptide shown below using single-letter codes. (Do not use punctuation marks or spaces to separate the letter (ie. if the 3 amino acids are A, B and C, write the sequence as ABC) 0 - 0- CH3 6- H₃C CH₂ Han CH2 CH2 CH-CH3 CH2 CH3 CH2 CH2 NH3 Which of the following is NOT a naturally occurring amino acid? OA) H3NCH-Coo OB) H3NCH-Coo CH2 он Oc) HNCH-Coo CH-OH...
5. Which of the 20 standard amino acids are a. Cyclic b. Aromatic C. Sometimes charged at physiological pH d. Technically not hydrophobic, polar, or charged e. Basic f. Acidic . Sulfur containing 6. Estimate the net charge of a His-His-His-His tetrapeptide at pH 6.0 7. The artificial non-nutritive sweetener aspartame is a dipeptide with the sequence Asp-Phe. The carboxyl terminus is methylated. Draw the structure of aspartame at pH 7.0. Sketch a titration curve for the amino acid cysteine,...
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...
Understand protonation and deprotonation of carboxyl and amino groups in amino acids Question Which of the following statements are NOT true regarding the ionization of nonacidic and nonbasic amino acids? Select all that apply: O The amino and carboxyl groups are both ionized at the isoelectric point. U The amino group will be ionized when the pH is above the isoelectric point. The carboxyl group will be ionized when the pH is below the isoelectric point. The amino group will...
Homework #11 (5 points) 1. Draw two amino acids. Circle around the carboxyl ends. Put a double line und and the three-letter abbreviation for each amino acid. two amino acids. Circle the central carbon atoms. Underline the amino ends. Carboxyl ends. Put a double line under the R groups/ side chains. Write the name 2. How do enzymes increase the rate of chemical reactions? 3. What type of bond joins two amino acids together? 4. What are the three types...
Question 2 (1 point) Amino acids can be classified as A. Hydrophobic amino acids with nonpolar R groups B. Polar amino acids with neutral R groups but the charge is not evenly distributed C. Positively charged amino acids with R groups that have positive charge at physiological pH. D. Negatively charged amino acids with R groups that have a negative charge at physiological pH. How would the amino acid alanine be classified? Think through your reasoning. L-Alanine H2N-CHC-OH CH3
help!!
15 Determine the pl (isoelectric point) for Arg (R). This could be a range of values. For Q 18-20 list the amino acids that fall into each category. Include only the one-letter codes. 16 e Positively charged R group (i.e sidechain) at physiological pH (pH=7) *hint: looking for 2 a.a. Aromatic R group (.e. sidechain), hydrophobic (non-polar) and neutral at pH <14. *hint: looking for 2 a.a.
Fill in the blanks for each amino acid
Amino Acid Properties Name of R-group Properties Amino Acid Type of Polarity pKa Charge at Special functional group pH-7 Properties (hn(wpp)amgies applicable) (whpee Alanine Arginine Asparagine Aspartate Carboxyl Polar 3.9 Sulfhydryl Polar N/A Forms S-S Glutamine Glutamate Histidine Isoleucine Lysine Methionine Phenylalanine Aromatic Non-Polar Absorbs G@ 280 nm N/A Proline Can be Serine Threonine Tryptophane Tyrosine Valine
From N to C terminus, name the amino acids in the polypeptide shown below using single-letter codes. (Do not use punctuation marks or spaces to separate the letter (ie. if the 3 amino acids are A, B and C, write the sequence as ABC) 0 - 0- CH3 6- H₃C CH₂ Han CH2 CH2 CH-CH3 CH2 CH3 CH2 CH2 NH3 Which of the following is NOT a naturally occurring amino acid? OA) H3NCH-Coo OB) H3NCH-Coo CH2 он Oc) HNCH-Coo CH-OH...
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