Fundamentals of Amino Acids and Proteins

Biochemistry

An overview of amino acid classification based on polarity, charge, and nutritional requirements, and the formation of peptide bonds in proteins.

proteins amino-acids biochemistry

10 Questions Medium Ages 16+ Nov 10, 2026

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About this Study Set

This study set covers Biochemistry through 10 practice questions. An overview of amino acid classification based on polarity, charge, and nutritional requirements, and the formation of peptide bonds in proteins. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 10 questions from the Fundamentals of Amino Acids and Proteins study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What type of reaction forms a peptide bond between amino acids?

A Hydrolysis
B Condensation
C Oxidation
D Reduction

2 Which group of amino acids is typically found in the interior of proteins?

A Polar
B Hydrophilic
C Nonpolar
D Charged

3 Which of the following is classified as a basic (positively charged) amino acid?

A Aspartic acid
B Glutamic acid
C Lysine
D Serine

4 What are the three aromatic amino acids?

A Phenylalanine, Tyrosine, Tryptophan
B Alanine, Valine, Leucine
C Serine, Threonine, Cysteine
D Lysine, Arginine, Histidine

5 Which amino acid contains an imino group?

A Glycine
B Proline
C Alanine
D Methionine

6 At a pH value equal to the pKa of a functional group, what is the state of the group?

A 100% protonated
B 100% deprotonated
C 50% protonated and 50% deprotonated
D Non-reactive

7 Which amino acid is considered essential in infants but typically non-essential in adults?

A Arginine
B Histidine
C Leucine
D Methionine

8 Sulfur-containing amino acids include:

A Methionine and Cysteine
B Serine and Threonine
C Alanine and Glycine
D Lysine and Arginine

9 What functional group is found at the start of an amino acid chain alongside the carboxyl group?

A Hydroxyl group
B Amino group
C Methyl group
D Phosphate group

10 Which of the following is an acidic (negatively charged) amino acid?

A Arginine
B Aspartate
C Histidine
D Glutamine

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