Scientific experiments showed evidence that the mass of an atom was greater than the total mass of its protons. these experiments led to the discovery of the nucleus. neutron. electron. proton.

Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.