COMPOUNDS OF LIVING THINGS Chapter 11 – 2 Part 1

CARBOHYDRATES Carbohydrates are biochemicals that are made of sugar molecules bonded together.

SIMPLE CARBOHYDRATES Glucose is a simple sugar or simple carbohydrate. The body can break down simple sugars quickly for energy. Simple sugars include sucrose, lactose, and fructose.

COMPLEX CARBOHYDRATES Complex carbohydrates are composed of 3 or more simple sugars. The simple sugars join together to form chains of repeating units. These break down slowly providing a long term source of energy. Sources are legumes, whole grains, and starchy vegetables.

Living things use carbohydrates mostly as a source of energy. Example: glycogen supplies energy to muscle cells. They have other uses as well. Example: cellulose gives cell walls in plants their rigid structure.

LET’S FIND OUT! What foods contain starch? LAB: Testing for Starches