Podcast
Questions and Answers
Which functional group is present in all amino acids except for proline?
Which functional group is present in all amino acids except for proline?
- Quaternary amino group
- Primary amino group (correct)
- Secondary amino group
- Tertiary amino group
At what pH range are the carboxylic acid groups of amino acids almost entirely in their carboxylate forms?
At what pH range are the carboxylic acid groups of amino acids almost entirely in their carboxylate forms?
- Between 1.0 and 2.0
- Below 2.0
- Above 3.5 (correct)
- Around 4.5
What are the pK values of the !-amino groups of amino acids near?
What are the pK values of the !-amino groups of amino acids near?
- 7.0
- 5.2
- 9.4 (correct)
- 3.5
In the physiological pH range, how are both the carboxylic acid and the amino groups of amino acids generally found?
In the physiological pH range, how are both the carboxylic acid and the amino groups of amino acids generally found?
What is the term for substances that can act as both an acid and a base?
What is the term for substances that can act as both an acid and a base?
What refers to the side groups of amino acids with acid–base properties?
What refers to the side groups of amino acids with acid–base properties?
What is the term used to describe molecules that bear charged groups of opposite polarity, as mentioned in the text?
What is the term used to describe molecules that bear charged groups of opposite polarity, as mentioned in the text?
Why do most !-amino acids have higher melting points compared to their nonionic derivatives?
Why do most !-amino acids have higher melting points compared to their nonionic derivatives?
Which spectroscopic method has been used to establish the zwitterionic character of !-amino acids?
Which spectroscopic method has been used to establish the zwitterionic character of !-amino acids?
In what type of solvents are amino acids more soluble, according to the text?
In what type of solvents are amino acids more soluble, according to the text?
Why are most !-amino acids largely insoluble in most organic solvents?
Why are most !-amino acids largely insoluble in most organic solvents?
