Question

an enzyme known as amylase is found in the saliva of humans. this enzyme helps to begin the process of digesting starch molecules in the foods we eat. which of these best describes how enzymes like amylase help in the process of digestion?

a. amylase contains the dna molecules necessary to assemble the proteins needed for digestion

b. amylase is a catalyst that speeds up the chemical process of breaking down food molecules

c. amylase breaks down the food molecules directly by forming powerful acids

d. amylase acts as a buffer to keep the ph of foods at a consistent level

Explanation:

Enzymes are biological catalysts. They speed up chemical reactions in the body. Amylase, as an enzyme, helps in digestion by speeding up the breakdown of starch (a food molecule). Option A is incorrect because amylase is a protein (enzyme), not a carrier of DNA. Option C is wrong as amylase does not form acids to break down food. Option D is incorrect because amylase's role is not as a buffer for pH.

Answer:

B. Amylase is a catalyst that speeds up the chemical process of breaking down food molecules