Molecules with similar shapes have similar biological effects, because shape (structure) dictates effects (functions).
Polysaccharides have 1 sugar
disaccharides have 2 sugars
monosaccharides have a chain of sugars
The enzyme pepsin functions with a very low pH of around 2. It is found in the stomach, with the acidity coming from the hydrochloric acid present there. it breaks proteins into amino acids.
Which level of organization describes the stomach?
B.) organ
Where is starch in food first digested in the digestive system?
The mouth and small intestine both have a part in digesting starch, but the keyword is "first" so of course that would be:
A.) mouth
Hope this helped. I believe I am right, but correct me if I'm wrong. :)