What is the basic monomer unit of a protein?

• Nucleotide

• Monosaccharide

• Amino acid

• Fatty acid

Which elements are primarily found in amino acids?

• Carbon, hydrogen, oxygen, and nitrogen

• Carbon, hydrogen, oxygen, and sulfur

• Carbon, hydrogen, oxygen, and phosphorus

• Carbon, hydrogen, oxygen, and chlorine

How many common amino acids are there that make up proteins in the human body?

• 10

• 20

• 50

• 100

What type of bond is formed between amino acids to form a polypeptide chain?

• Ionic bond

• Hydrogen bond

• Peptide bond

• Covalent bond

What is the term for a chain of amino acids linked by peptide bonds?

• Polysaccharide

• Polypeptide

• Polyunsaturated fat

• Polyatomic ion

Which part of the amino acid structure varies and determines the different properties of amino acids?

• Amino group

• Carboxyl group

• Hydrogen atom

• R group (side chain)

Which of the following is NOT a function of proteins in the body?

• Catalyzing metabolic reactions

• Providing structural support

• Storing genetic information

• Regulating cell processes

What is the term for proteins that speed up chemical reactions in the body without being consumed?

• Hormones

• Antibodies

• Enzymes

• Transport proteins

What is the role of transport proteins in the body?

• To break down nutrients

• To move substances across cell membranes

• To store energy

• To transmit nerve impulses

Which of the following is a protein that helps protect the body from pathogens?

• Insulin

• Hemoglobin

• Antibodies

• Actin