D - birth control is the most widely accepted method
The best answer is B - Proteins.
Proteins make up enzymes, or to put it another way enzymes are made up of protein. It is enzymes that speed up the chemical reactions. Enzymes are organic catalysts, substances that speed up a (biochemical) reaction but do not take part in the reaction and remain unchanged at the end of the reaction.
In man, there are many enzymes. The majority of these are found in the digestive system where they greatly aid the process of food breakdown from complex molecules to simple molecules. Examples include salivary amylase found in saliva, which begins the gradual breaking down of starch into glucose right from the moment food is placed in the mouth and mixed with saliva. Pepsin in the stomach breaks down protein.
The genus and the Species
<span>Which structure secretes digestive enzymes that break down carbohydrates, fats, and proteins? A. Pancreas
Most of the enzyme in the intestinal system is made by pancreas. Pancreas will also secrete insulin to make cell utilize glucose. The Large intestine is absorbing water. Salivary glands mostly digest carbohydrate.</span>
