1. All biomolecules exist as a racemic mixture: true or false? 2. Which amino acid can...
1. All biomolecules exist as a racemic mixture: true or false?
2. Which amino acid can serve as either a proton donor or acceptor at a physiological pH?
Homework Answers
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1. All biomolecules exist as a racemic mixture: true or
false?
2. Which amino acid can...
Answer by true or false - if false correct the statement. ( 7-) The mixture of...
Answer by true or false - if
false correct the statement.
( 7-) The mixture of equi 0.2M solution of sodium acetate and acetic acid has lower buffer capacity than the mixture of equi 0.5M NaCl and HCI. 8- Electron pair donor) is the definition of Lewis acid. false= acceptor if acid donor if base (9-) Ka of NH4OH is 5.376x10-10. (10- pH for 0.1 M Acetic acid ( Ka = 1.8 x10 -S) is 1.73.
true or false. at physiological PH, nearly all amino acids have overall positive charge True False...
true or false. at physiological PH, nearly all amino acids
have overall positive charge
True False 1) At physiological pH, nearly all amino acids have an overall positive charge. 2) The dipeptide abbreviated as Gly-Lys is the same as the dipeptide abbreviated as Lys-Gly. tide 3) The peptide sequence Gly-Gly-Gly gives the primary structure of a tripeptide. 4) The u-helix is a secondary structure. 5) The triple helix of collagen is a tertiary structure.
Polar molecules tend to be soluble in water. a) True b) False Which liquid is miscible...
Polar molecules tend to be soluble in water. a) True b) False Which liquid is miscible with water? a) carbon tetrachloride b) ethyl alcohol c) bromine d) oil Which anion will not precipitate silver ion? a) chloride b) nitrate c) bromide d) carbonate Which pH listed below is most acidic? a) 3 d) 7 c)9 d) 14 A hydrogen ion consists of a(n) a) electron. b) proton. c) neutron. d) proton and electron. Bronsted and Lowry defined an acid as...
All the different biomolecules can serve as energy sources. Explain which biomolecules are catabolized in which...
All the different biomolecules can serve as energy sources. Explain which biomolecules are catabolized in which reactions.
Which three statements about amino acids are true? Use this chart of amino acid structures for...
Which three statements about amino acids are true? Use this chart of amino acid structures for reference. Lysine has one stereocenter (chiral center). Methionine is a thiol. The Leu side chain does not form hydrogen bonds with other amino acids. The form of glycine used by the human body is D-glycine. Ser and Thr are polar amino acids. Proline has an overall charge at physiological pH (7.4).
Model 1 for reference, draw the structure of the given amino acid as it nly exist under each of t...
Model 1 for reference, draw the structure of the given amino acid as it nly exist under each of the following conditions for 1g.using Table 1 in a. valine; in the stomach at PH 1.5 Serine; in the small intestine at pH 10 c. Glutamate; in the blood plasma at pH 7.4 Information: Isoelectric points As shown in Model 3, amino acids do not normally exist in unionized forms. When an aminc acd contains both a (+) and a ()...
Which statement is true about a racemic mixture? TV Select one: O a. The specific rotation...
Which statement is true about a racemic mixture? TV Select one: O a. The specific rotation equals zero ob. Both enantiomers are present in equal amounts O c. The bp of the racemic mixture is equal to the bp of the pure enantiomers Od. All of the above
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
(References Explain why an amino acid will not exist in an un-ionized form at any pH....
(References Explain why an amino acid will not exist in an un-ionized form at any pH. All amino acids have a carboxyl group that is a stronger acid than water and an amino group that is a stronger acid than water. When lots of hydrogen ions are present (meaning the pH is relatively low), the carboxyl group is protonated and the amino group is unaffected When lots of hydroxide ions are present (meaning the pH is relatively high), the carboxyl...
1) Answer True or False for each questions a) Each amino acid is coded by a...
1) Answer True or False for each questions a) Each amino acid is coded by a single combination of three nucleotides. (T/F) b) Several amino acids can be coded by the same combination of three nucleotides. (T/F) c) Non-conventional nucleotides in anticodon can correspond to the first position of codon. (T/F) 2) For reading frames (potentially) for each RNA sequence, is it 1? I'm not sure if its one or three.
Answer by true or false - if
false correct the statement.
( 7-) The mixture of equi 0.2M solution of sodium acetate and acetic acid has lower buffer capacity than the mixture of equi 0.5M NaCl and HCI. 8- Electron pair donor) is the definition of Lewis acid. false= acceptor if acid donor if base (9-) Ka of NH4OH is 5.376x10-10. (10- pH for 0.1 M Acetic acid ( Ka = 1.8 x10 -S) is 1.73.
true or false. at physiological PH, nearly all amino acids
have overall positive charge
True False 1) At physiological pH, nearly all amino acids have an overall positive charge. 2) The dipeptide abbreviated as Gly-Lys is the same as the dipeptide abbreviated as Lys-Gly. tide 3) The peptide sequence Gly-Gly-Gly gives the primary structure of a tripeptide. 4) The u-helix is a secondary structure. 5) The triple helix of collagen is a tertiary structure.
Polar molecules tend to be soluble in water. a) True b) False Which liquid is miscible with water? a) carbon tetrachloride b) ethyl alcohol c) bromine d) oil Which anion will not precipitate silver ion? a) chloride b) nitrate c) bromide d) carbonate Which pH listed below is most acidic? a) 3 d) 7 c)9 d) 14 A hydrogen ion consists of a(n) a) electron. b) proton. c) neutron. d) proton and electron. Bronsted and Lowry defined an acid as...
Which three statements about amino acids are true? Use this chart of amino acid structures for reference. Lysine has one stereocenter (chiral center). Methionine is a thiol. The Leu side chain does not form hydrogen bonds with other amino acids. The form of glycine used by the human body is D-glycine. Ser and Thr are polar amino acids. Proline has an overall charge at physiological pH (7.4).
Model 1 for reference, draw the structure of the given amino acid as it nly exist under each of the following conditions for 1g.using Table 1 in a. valine; in the stomach at PH 1.5 Serine; in the small intestine at pH 10 c. Glutamate; in the blood plasma at pH 7.4 Information: Isoelectric points As shown in Model 3, amino acids do not normally exist in unionized forms. When an aminc acd contains both a (+) and a ()...
Which statement is true about a racemic mixture? TV Select one: O a. The specific rotation equals zero ob. Both enantiomers are present in equal amounts O c. The bp of the racemic mixture is equal to the bp of the pure enantiomers Od. All of the above
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
(References Explain why an amino acid will not exist in an un-ionized form at any pH. All amino acids have a carboxyl group that is a stronger acid than water and an amino group that is a stronger acid than water. When lots of hydrogen ions are present (meaning the pH is relatively low), the carboxyl group is protonated and the amino group is unaffected When lots of hydroxide ions are present (meaning the pH is relatively high), the carboxyl...
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