Question

what is the function of the protein keratin? to provide support and structure for cells in hair, skin, and nails to fight infections caused by bacteria and viruses to increase chemical reaction rates in the digestive system to transmit chemical signals throughout the body

Explanation:

Keratin is a fibrous structural protein. It is a key component of hair, skin, and nails, providing support and structure to these tissues. Antibodies fight infections, enzymes increase chemical - reaction rates in the digestive system, and hormones transmit chemical signals throughout the body.

Answer:

to provide support and structure for cells in hair, skin, and nails