Question

What is protein??
_____________

Answer 1

Answer:

$\huge\large{\sf{\underline{\underline\pink{Answer!!}}}}$

Proteins are essential nutrients for the human body. They are one of the building blocks of body tissue and can also serve as a fuel source. As a fuel, proteins provide as much energy density as carbohydrates: 4 kcal per gram; in contrast, lipids provide 9 kcal per gram. 

____________________________

Answer 2

Answer:

Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body’s tissues and organs.