2.3 Proteins

What are proteins primarily made of?

• Fatty acids

• Organic bases

• Amino acids

• Monosaccharides

Which of the following is NOT a function of proteins?

• Enzymes

• Cell membrane formation

• Hormones

• Nucleic acid storage

Which protein is responsible for carrying oxygen in the blood?

• Hemoglobin

• Collagen

• Insulin

• Keratin

What is the primary structure of a protein?

• Sequence of amino acids

• Alpha helix or beta pleated sheet

• Three-dimensional folding

• Formation of active sites

Which type of bond is formed between two cysteine molecules?

• Hydrogen bond

• Disulfide bond

• Ionic bond

• Covalent bond

What is the role of antibodies in the immune system?

• Fight causative agents of illness

• Strengthen tissues

• Control blood glucose concentration

• Form transport channels in cell membranes

Which structure of a protein is responsible for creating active sites that is usually folded?

• Primary structure

• Secondary structure

• Tertiary structure

• Quaternary structure

What is the simplest amino acid?

• Glycine

• Alanine

• Leucine

• Valine

Which type of bond is easily broken by changes in temperature or pH?

• Hydrogen bond

• Disulfide bond

• Ionic bond

• Covalent bond

What is the function of collagen in the body?

• Carry oxygen in the blood

• Strengthen tissues

• Control blood glucose concentration

• Form transport channels in cell membranes