The rest of the carbohydrates in banana are complex carbohydrate molecules, which are made up of several smaller sugar molecules bonded together to form large chains. (healthyeating.sfgate.com)
As they use the starch for energy, they release small carbohydrate molecules. (csiro.au)
The lining of the gut is coated with a protective barrier of carbohydrate molecules, or mucus. (mindbodygreen.com)