Inside your digestive system, protein molecules are broken down to amino acid molecules. (You can read about digestion on page 28.)
a Has a new substance been formed?
b Has a chemical reaction taken place​

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

c) should be the answer.

explanation:

a