Once Humans Ingest Food,the First Category of Macromolecules to Be

question 6

Multiple Choice

Once humans ingest food,the first category of macromolecules to be chemically digested by enzymes in the mouth is

• A)proteins.
• B)carbohydrates.
• C)lipids.
• D)nucleic acids.

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Definitions:

Phospholipids

A class of lipids that are a major component of all cell membranes as they can form lipid bilayers.

Hydrophilic Head

The part of a molecule, especially in lipids, that is attracted to water, allowing it to interact favorably with aqueous environments.

Hydrophobic Tails

Parts of molecules that are repelled by water but are attracted to fats and oils, often found in lipid structures such as cell membranes.

Phospholipid

A type of lipid molecule that is a major component of all cell membranes, consisting of two fatty acids, a phosphate group, and a glycerol molecule.