8 Questions
What type of amino acids are found in proteins?
a-amino acids
What functional groups does an amino acid contain?
Amino (!NH2) group and carboxyl (!COOH) group
Where are the amino group and carboxyl group attached in an a-amino acid?
To the a-carbon atom
What percentage of a cell's overall mass do proteins account for?
15%
What is the average nitrogen content of proteins by mass?
15%
Which element is found in proteins but not in carbohydrates and lipids?
Nitrogen
Which element is an essential constituent of certain specialized proteins?
Phosphorus
Which protein is the main protein of milk and contains phosphorus?
Casein
Test your knowledge of amino acid structures and properties with this quiz. Identify the general structural formula of a-amino acids and understand the key functional groups present in these important organic compounds.
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