Question

1. your friend is on the cross country running team. they tell you they need to \carbo - load\ ahead of their big race in a couple days as they want to store extra carbohydrates in their muscles.
2. identify what macromolecule should they eat more of over the next couple of days? identify that molecules function.
3. identify what food from the selection should they eat.
4. explain how you know that food has the macromolecule they need.

hint: you will need to use the macromolecule table, your knowledge of the different tests, and the videos above to explain your answer.

Explanation:

1. Since they are carbo - loading, they should eat more carbohydrates. Carbohydrates are the body's main source of energy and can be stored as glycogen in muscles for later use during physical activity.
2. Foods rich in carbohydrates include bread, pasta, rice, and potatoes. For example, pasta is a good choice as it is high in complex carbohydrates.
3. We know these foods have carbohydrates because common knowledge and macromolecule tables show that grains (used to make bread and pasta) and starchy vegetables (like potatoes) are high - carbohydrate sources. Also, tests like the Benedict's test for reducing sugars or iodine test for starches can confirm the presence of carbohydrates in these foods.

Answer:

1. Macromolecule: Carbohydrates. Function: Main source of energy, can be stored as glycogen in muscles for energy during physical activity.
2. Foods: Bread, pasta, rice, potatoes (any one or more of these high - carbohydrate foods).
3. Reason: Grains used for bread and pasta and starchy vegetables like potatoes are known to be high in carbohydrates. Tests such as Benedict's for reducing sugars or iodine for starches can confirm their presence.