Amino Acids - USABO Exam Questions & Answers (Grade A+).docx

Amino Acids - USABO Exam
Questions & Answers (Grade A+)
What are amino acids? -
correct answer ✅- Basic units of proteins
- Coded by DNA, link together to form proteins
- There are 20 types of amino acids found in humans
- Each type of amino acid has a unique R group (part of the
molecule with a carbon or hydrogen atom)


Polar vs. nonpolar amino acids -
correct answer ✅Polar: hydrophilic/interact with water
Nonpolar: hydrophobic/do not interact with water


Neutral polar amino acids -
correct answer ✅Serine, Threonine, Cysteine, Tyrosine,
Asparagine, Glutamine


Nonpolar amino acids -
correct answer ✅Glycine, Alanine, Valine, Leucine, Isoleucine,
Phenylalanine, Tryptophan, Methionine, Proline


Alanine (Ala, A) -
correct answer ✅Nonpolar

, Amino Acids - USABO Exam
Questions & Answers (Grade A+)




Asparagine (Asn, N) -
correct answer ✅Polar, no charge




Aspartate (Asp, D) -
correct answer ✅Polar, negative charge, acidic