Podcast
Questions and Answers
Which of the following amino acids is classified as non-polar?
Which of the following amino acids is classified as non-polar?
- Lysine
- Proline (correct)
- Glutamate
- Histidine
Which category includes amino acids that are positively charged?
Which category includes amino acids that are positively charged?
- Polar +vely charged (correct)
- Non-polar
- Polar -vely charged
- Polar uncharged
Which of these amino acids is considered polar and uncharged?
Which of these amino acids is considered polar and uncharged?
- Serine (correct)
- Asparagine
- Valine
- Isoleucine
What is a common characteristic of amino acids classified as polar -vely charged?
What is a common characteristic of amino acids classified as polar -vely charged?
Which amino acid is NOT classified as polar?
Which amino acid is NOT classified as polar?
Flashcards
Non-polar Amino Acids
Non-polar Amino Acids
Amino acids that have side chains that are hydrophobic, meaning they don't interact with water very well. They are often found buried inside proteins, away from the aqueous environment.
Positively Charged Amino Acids
Positively Charged Amino Acids
Amino acids that have side chains that are hydrophilic and carry a positive charge. They are often found on the surface of proteins where they interact with water and other charged molecules.
Negatively Charged Amino Acids
Negatively Charged Amino Acids
Amino acids that have side chains that are hydrophilic and carry a negative charge. They are often found on the surface of proteins, involved in interactions with other charged molecules.
Uncharged Polar Amino Acids
Uncharged Polar Amino Acids
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What determines amino acid properties?
What determines amino acid properties?
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Study Notes
Amino Acid Classification
- Amino acids are classified based on their polarity and charge.
- Nonpolar amino acids lack charged or highly polar groups.
- Polar amino acids have polar groups, but are uncharged or minimally charged on their side chains.
- Polar amino acids are further divided by their charges on their side chains.
- Some amino acids are polar but have charged side chains, such as positively or negatively charged groups.
Nonpolar Amino Acids
- Glycine, Alanine, Valine, Leucine, Isoleucine, Methionine, Proline
- These amino acids lack charged or highly polar groups on their side chains.
Polar, Uncharged Amino Acids
- Serine, Threonine, Cysteine, Asparagine, Glutamine
- These amino acids have polar groups, but are not charged at neutral pH.
Polar, Positively Charged Amino Acids
- Lysine, Arginine, Histidine
- These amino acids have positively charged side chains.
Polar, Negatively Charged Amino Acids
- Aspartate, Glutamate
- These amino acids have negatively charged side chains.
Aromatic Amino Acids
- Phenylalanine, Tyrosine, Tryptophan
- These amino acids have aromatic rings in their side chains.
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