Question

runners often eat a big meal of pasta before a big race. which molecules in the pasta increase the runner’s energy

Answer 1

Starch

Step-by-step explanation:

Pasta is made of eggs and flour. The eggs are basically water, proteins and fats while flour is composed by starch.

Starch is a macromolecule that is composed of two polysaccharides, amylose and amylopectin, which are big chains of glucose, so starch is a carbohydrate. Carbohydrates are the biggest source of energy to the body, then, the starch will be the molecule in the pasta that increases the runner’s energy.

Bear in mind that proteins and fats also give energy but, as the starch is in greater proportion it will provide more energy to the runner.

Answer 2

The molecules of carbohydrates (carbon, hydrogen and oxygen) are the responsible to produce energy in our bodies as result of the metabolism (chemical reactions that occur in our body).