12 Questions
What type of amino acids have ionized carboxyl groups in their side chains?
Polar, negatively charged
Which group of amino acids reacts with water to release a hydroxide anion?
Polar, positively charged
In which type of amino acids do all differences depend on their side-chain R groups?
Hydrophobic
What is the structural relationship between amino acids in a protein?
Peptide bond
Which amino acid terminal is written on the left in the structure of a peptide?
Amino terminal (N-terminal)
What kind of reaction forms peptide bonds between amino acids?
Dehydration reaction
What does the term 'protonation' refer to in chemistry?
Addition of a proton
In the context of pH, what does the pKa value indicate?
Acidity of a solution
What determines the isoelectric point (pI) of a molecule?
Average of pKa values around zwitterion
Which amino acid has an isoelectric point (pI) defined by the average pKa values if it has more than 2 pKas?
Tryptophan
What type of bond is responsible for stabilizing the tertiary structure of proteins?
Ionic bond
How are hydrophobic interactions involved in maintaining the tertiary structure of proteins?
By repelling water molecules
Review Chapter 18 covering protein building blocks, specifically focusing on amino acids. Topics include the structure, common types, and classification based on side chain polarity.
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