21. What macromolecule is broken down by microflora, but not humans, and helps clean out
our digestive tracts as it moves along?
A. carbohydrates
B. cellulose
C. amino acids
D. lipids

21 What macromolecule is broken down by microflora but not humans and helps clean out our digestive tracts as it moves along A carbohydrates B cellulose C amino class=