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Questions and Answers
Which amino acid contains two carbon atoms?
Which amino acid contains two carbon atoms?
Which of the following is a sulfur-containing amino acid?
Which of the following is a sulfur-containing amino acid?
What classification does the amino acid Tyrosine fall into?
What classification does the amino acid Tyrosine fall into?
Which of the following amino acids is not branched chain?
Which of the following amino acids is not branched chain?
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Which amino acid is classified as imino?
Which amino acid is classified as imino?
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Which of the following amino acids is classified as non-essential?
Which of the following amino acids is classified as non-essential?
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What is the biological value of a protein that contains all essential amino acids?
What is the biological value of a protein that contains all essential amino acids?
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Which amino acid is purely ketogenic?
Which amino acid is purely ketogenic?
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Which of the following is not an essential amino acid?
Which of the following is not an essential amino acid?
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Which amino acid is considered an imino acid?
Which amino acid is considered an imino acid?
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Which of the following amino acids is classified as aromatic?
Which of the following amino acids is classified as aromatic?
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What role do non-essential amino acids play in metabolism?
What role do non-essential amino acids play in metabolism?
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Which one of the following is classified as a semiessential amino acid for humans?
Which one of the following is classified as a semiessential amino acid for humans?
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Which amino acid is an example of a polar amino acid?
Which amino acid is an example of a polar amino acid?
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Which of the following is classified as a ketogenic amino acid?
Which of the following is classified as a ketogenic amino acid?
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What property allows amino acids to behave as both acids and bases?
What property allows amino acids to behave as both acids and bases?
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Which type of solvent are amino acids generally soluble in?
Which type of solvent are amino acids generally soluble in?
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Amino acids that do not absorb visible light are categorized as what?
Amino acids that do not absorb visible light are categorized as what?
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Which of the following amino acids is classified as having a polar, uncharged side chain?
Which of the following amino acids is classified as having a polar, uncharged side chain?
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Which amino acids are considered basic due to their positively charged side chains?
Which amino acids are considered basic due to their positively charged side chains?
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What characterizes non-polar (hydrophobic) amino acids in terms of their behavior in proteins?
What characterizes non-polar (hydrophobic) amino acids in terms of their behavior in proteins?
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Which of the following amino acids is categorized as an essential amino acid?
Which of the following amino acids is categorized as an essential amino acid?
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What is true about the amino acids with negatively charged side chains?
What is true about the amino acids with negatively charged side chains?
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Which statement accurately describes polar amino acids?
Which statement accurately describes polar amino acids?
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Which amino acids are classified as semi-essential?
Which amino acids are classified as semi-essential?
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Why are polar amino acids often found on the surface of proteins?
Why are polar amino acids often found on the surface of proteins?
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What occurs at the isoelectric point of amino acids?
What occurs at the isoelectric point of amino acids?
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Which statement correctly describes zwitter ions?
Which statement correctly describes zwitter ions?
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At a higher pH, amino acids predominantly carry what kind of charge?
At a higher pH, amino acids predominantly carry what kind of charge?
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What characterizes amino acids in a neutral pH environment?
What characterizes amino acids in a neutral pH environment?
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What is true for the amino acids in an acidic environment?
What is true for the amino acids in an acidic environment?
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Study Notes
Amino Acid Classification by Carbon Atoms
- 2 Carbons: Glycine
- 3 Carbons: Alanine, Serine, Cysteine, Phenylalanine, Tyrosine, Tryptophan, Histidine
- 4 Carbons: Methionine, Threonine
- 5 Carbons: Arginine, Valine
- 6 Carbons: Lysine, Leucine, Isoleucine
Amino Acid Classification By Structure
- Imino Acid: Proline
- Acidic Amino Acids: Glutamic acid and Aspartic acid
- Basic Amino Acids: Lysine, Arginine, and Histidine
- Sulfur Containing Amino Acids: Cysteine, Methionine
- Hydroxy Amino Acids: Serine, Tyrosine, Threonine
- Aromatic Amino Acids: Phenylalanine, Tyrosine, Tryptophan
- Heterocyclic Amino Acids: Histidine, Proline, Tryptophan
- Aliphatic Amino Acids: All other amino acids
- Branched Chain Amino Acids: Valine, Leucine, Isoleucine
- Amide Group Containing Amino Acids: Glutamine and Asparagine
Amino Acid Classification By Polarity
-
Hydrophilic Amino Acids:
- Basic Side Chain Amino Acids: Lysine, Arginine, Histidine
- Acidic Side Chain Amino Acids: Glutamic acid, Aspartic acid
- Polar, Uncharged Side Chain Amino Acids: Serine, Threonine, Tyrosine, Cysteine, Asparagine, Glutamine
- Hydrophobic Amino Acids: Alanine, Valine, Leucine, Isoleucine, Proline, Phenylalanine, Tryptophan, Methionine, Glycine
Amino Acid Classification By Nutritional Requirements
- Essential Amino Acids: Valine, Isoleucine, Leucine, Lysine, Arginine, Methionine, Threonine, Tryptophan, Phenylalanine, Histidine
- Semi-Essential Amino Acids: Arginine, Histidine
- Non-Essential Amino Acids: All other amino acids
Amino Acid Classification By Metabolic Fate
- Pure Ketogenic: Leucine, Lysine
- Glucogenic and Ketogenic: Isoleucine, Tyrosine, Phenylalanine, Tryptophan
- Pure Glucogenic: All other amino acids
Amino Acid Properties
- Solubility: Soluble in polar solvents like water and alcohol due to the presence of charged groups, Insoluble in non-polar solvents
- Color: Colorless (except aromatic amino acids which absorb ultraviolet light at a wavelength of 280nm)
- Amphoteric Property: Can behave as both an acid (proton donor) and a base (proton acceptor)
- Isoelectric Point: The specific pH at which the amino acid exists in a dipolar form with zero net charge.
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Description
Test your knowledge on the classification of amino acids based on various criteria such as carbon atoms, structure, and polarity. This quiz covers essential amino acids, their properties, and their groupings. Perfect for students studying biochemistry or molecular biology.
