10 Questions
What functional groups are present in amino acids?
Amino and carboxyl
How many amino acids are commonly found as constituents of mammalian proteins?
20
What type of amino group does proline have?
Secondary amino group
At physiologic pH, what is the charge on the carboxyl group of amino acids?
Negatively charged carboxylate ion (–COO–)
How are amino acids classified according to their properties?
By the nature of their side chains (-R group)
Which functional group in amino acids is considered acidic in nature?
Carboxyl group
How many different amino acids are commonly found as constituents of mammalian proteins?
Exactly 20
What type of amino group does proline have?
Secondary amino group
At physiologic pH (pH= 7.4), what form do the amino acids mostly exist in?
Dipolar ion form
What plays a role in classifying amino acids according to the properties of their side chains?
Side chain (-R group)
Study Notes
Amino Acid Structure and Properties
- Amino acids possess both amino and carboxyl functional groups.
- There are 20 amino acids commonly found as constituents of mammalian proteins.
Amino Group Characteristics
- Proline has a secondary amino group.
- The amino group is basic in nature.
Carboxyl Group Characteristics
- At physiologic pH (pH= 7.4), the carboxyl group has a negative charge.
Classification of Amino Acids
- Amino acids are classified according to their properties, including the properties of their side chains.
- Hydrophobicity and charge of the side chains play a role in classifying amino acids.
pH and Amino Acid Form
- At physiologic pH (pH= 7.4), amino acids mostly exist in their zwitterionic form.
Test your knowledge about the structures, classification, and genetic code of amino acids in medical biochemistry. Dr. Ahmed Ghdhban Al-Ziaydi PhD. provides insights into this fundamental topic.
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