What are the building blocks of proteins?

• Nucleotides

• Amino acids

• Fatty acids

• Sugars

How many different amino acids are encoded by the standard genetic code?

• 10

• 20

• 22

• 30

What functional groups do amino acids contain?

• Hydroxyl and carbonyl

• Amino and carboxyl

• Phosphate and sulfhydryl

• Methyl and acetyl

How does the chemical structure of amino acids influence proteins?

• By altering their color

• By determining their three-dimensional structure

• By changing their temperature stability

• By affecting their taste

Name one important metabolic intermediate derived from amino acids.

• Glucose

• ATP

• Creatine

• Cholesterol

What is the significance of tyrosine in the body?

• It is a source of energy

• It is a precursor for hormones and neurotransmitters

• It helps in digestion

• It stores genetic information

What is the three-letter code for Tyrosine?

• Tyr

• Trp

• Thr

• Lys

How are amino acids categorized based on their R groups?

• By size and shape

• By charge and polarity

• By color and mass

• By boiling point and melting point

Identify three nonpolar amino acids.

• Serine, Threonine, Glutamine

• Glycine, Alanine, Valine

• Lysine, Arginine, Histidine

• Cysteine, Asparagine, Proline

What is unique about proline compared to other amino acids?

• It is nonpolar

• It forms disulfide bonds

• Its side chain bonds to the backbone nitrogen

• It is the only amino acid without an R group