Glucose molecules are small enough to pass through the holes in the Visking tubing to the liquid in the beaker. This model of the absorption of digested food in the small intestine has limitations.

Two ATP molecules are synthesized in the cytoplasm via the conversion of glucose molecules to pyruvate. Both the apparatus (enzymes) and the physical environment necessary for the oxidation of ...

Starch and cellulose are polymers made from the glucose monomer. Proteins are polymers of the amino acids monomers. Lipids are made from two different molecules called fatty acids and glycerol.