CELL STRUCTURES AND FUNCTION
BIO MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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results in the formation of a new substance
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does not break down food
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is a physicial process
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does not result in a new substance does not result in a new substance
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Detailed explanation-1: -Food is chemically changed in digestion when new, smaller substances are formed. These chemical changes are examples of chemical digestion. Chemical digestion begins in the mouth when enzymes in saliva begin to break down carbohydrates. Most chemical changes in digestion occur in the small intestine.
Detailed explanation-2: -Chemical digestion breaks down different nutrients, such as proteins, carbohydrates, and fats, into even smaller parts: Fats break down into fatty acids and monoglycerides. Nucleic acids break down into nucleotides. Polysaccharides, or carbohydrate sugars, break down into monosaccharides.
Detailed explanation-3: -Intestinal brush border enzymes and pancreatic enzymes are responsible for the majority of chemical digestion. The breakdown of fat also requires bile. Most nutrients are absorbed by transport mechanisms at the apical surface of enterocytes.
Detailed explanation-4: -Proteins break down into amino acids.