Amino Acids and Their Characteristics

What are the building blocks of proteins in our body?

• Lipids

• Carbohydrates

• Nucleic Acids

• Amino Acids

What is the charge of the amino group at physiological pH?

• Neutral

• Negatively charged

• Variable

• Positively charged

How many amino acids are considered essential and must be obtained through diet?

• Eleven

• Seven

• Five

• Nine

Which of the following amino acids is non-polar?

• Serine

• Histidine

• Phenylalanine

• Glutamine

Which amino acid is responsible for forming disulfide bridges?

• Tyrosine

• Arginine

• Cysteine

• Lysine