1. How does eating food benefit an animal? Select all that apply.

The animal gets energy from the food.
The animal gets raw materials from the food.
The animal gets water from the food.

2. Which molecules contain only carbon, hydrogen, and oxygen?

Select all that apply.

carbohydrates
glucose

3. What is a polymer?

a large molecule made of smaller molecules joined together, sometimes in a repeating pattern

4. What is true about this polymer?

This polymer consists of two different monomers.

5. What happens to an animal that lacks food?

The cells of the animal cannot work properly, and the animal eventually dies.

6. Why do animals need to take in oxygen?

to break down fuel molecules

7. Which molecule is a source of carbon, hydrogen, and oxygen atoms for making proteins?

carbohydrates

8. Which of the following are carbohydrates?

Select all that apply.

glycogen
starches
sugars

9. What is the main role of the sugar deoxyribose?

It makes up part of the DNA.

10. Which statement best describes the role of phospholipids in the cells of living organisms?

They act as the building blocks for cell membranes.

11. What describes the role of fats in the body?

Lipids help form cell membranes and also store energy.

12. Which of the following are true of trans-fatty acids?

Select all that apply.

cause the shape of fatty acids to be incorrect
often created by treating plant oils with hydrogen

13. What type of fatty acid molecule is covered with as many hydrogen atoms as
possible?

saturated fatty acid