Protein functions in the human body

The video tutorial explains proteins as essential macromolecules, detailing their composition from amino acids and their diverse roles in biological processes. It covers protein structure, enzyme functions, transport, structural, storage proteins, hormones, defense mechanisms, and contractile proteins. The importance of protein shape and ligand binding for specific functions is highlighted.

Which of the following is NOT one of the four essential macromolecules of life?

• Proteins

• Carbohydrates

• Nucleic acids

• Vitamins

What is the primary role of enzymes in biological systems?

• To store energy

• To speed up chemical reactions

• To transport molecules

• To provide structural support

Which protein is responsible for transporting oxygen in the body?

• Myosin

• Hemoglobin

• Ferritin

• Keratin

How does insulin help regulate blood sugar levels?

• By storing excess glucose

• By converting glucose to fat

• By breaking down glucose

• By encouraging cells to absorb glucose

What is the function of antibodies in the immune system?

• To transport nutrients

• To store iron

• To contract muscles

• To defend against pathogens