12 Questions
What is the pH scale range for indicating the acidity or basicity of a solution?
0 to 14
At what pH state will amino acids be deprotonated?
Above pKa
What defines the biological function of proteins?
Tertiary structure
Which type of bond is formed between two cysteine residues to maintain tertiary structure?
Disulfide bond
What is the isoelectric point (pI) of a molecule?
The point where there is no net charge
Which amino acid is mentioned to be the only common one that is not chiral?
Glycine
What functional groups are present in amino acids at physiologic pH 7?
Carboxyl group in -COO- and amino group in -NH3+
Which class of amino acids have ionized carboxyl groups in their side chains?
Polar, negatively charged
What type of bond links the carboxyl group of one amino acid to the amino group of another amino acid?
Peptide linkage
What is the meaning of N-terminal in peptides and proteins?
Amino acid with a free a-NH3+ group
Which amino acid class reacts with water to release a hydroxide anion?
Polar, positively charged
What type of reaction is involved in linking two amino acids to form a dipeptide?
Dehydration reaction
Prepare for your CHEM 111 Exam 4 by reviewing Chapter 18: Protein Structure and Function, focusing on the building blocks of proteins, specifically the a-Amino Acids. Learn about the structure of a-Amino Acids, their common occurrence in nature, and the classes of amino acids based on the polarity of their side chains.
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