On food packages, to what does the term "insoluble fiber" refer? 1.chitin 2.starch 3.cellulose 4.amylopectin 5.polypeptides

I believe the answer is 3.Cellulose

Fiber is carbohydrate that can't be digested by human. Consumption of fiber will not give calorie like other food do, but it has other benefit for the digestive system such as helping regulate blood sugar level and satiety.

Cellulose is fiber that could be found in cell wall of green plants. Cellulose is the most common insoluble fiber.

examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).