Quiz on Nutritional Biochemistry: Dietary Proteins and Health

What is the primary structure of a protein?

• The stable arrangements of amino acids into patterns

• The sequence of amino acid residues in a polypeptide chain

• The interaction between multiple polypeptide chains

• The three-dimensional arrangement of protein

Which of the following is NOT a classification of proteins?

• Simple proteins

• Complex proteins

• Conjugated proteins

• Derived proteins

What are essential amino acids?

• Amino acids that are only found in plants

• Amino acids that can be synthesized by the body

• Amino acids that are non-polar

• Amino acids that must be obtained through diet

Which type of protein is soluble in water and digestible?

• Derived proteins

• Conjugated proteins

• Globular proteins

• Fibrous proteins

What is the role of peptides in the body?

• They are not biologically active

• They are only involved in muscle contraction

• They serve as neurotransmitters and hormones

• They are the building blocks of carbohydrates

Which of the following describes the tertiary structure of a protein?

• The sequence of amino acids

• The formation of alpha-helices and beta-sheets

• The arrangement of polypeptide chains

• The three-dimensional conformation of a polypeptide

What is denaturation in proteins?

• The loss of secondary and tertiary structure

• The formation of peptide bonds

• The synthesis of new proteins

• The process of protein folding

Which amino acid is classified as semi-essential?

• Lysine

• Threonine

• Histidine

• Methionine

What is the function of globular proteins?

• Provide structural support

• Catalyze metabolic reactions

• Store genetic information

• Form rigid structures

Which of the following is a characteristic of fibrous proteins?

• Globular in shape

• Digestible

• Soluble in water

• Insoluble in water