Question

a student plans to build a model of a lipid molecule. which of the following describes a typical characteristic of lipid molecules the student should include in the model?

• a long chain of hydrogen and carbon atoms
• a large ring containing carbon and oxygen atoms
• a single carbon atom bonded to nitrogen and hydrogen atoms
• a chain of carbon atoms bonded to nitrogen and phosphorus atoms

Explanation:

Lipid molecules, like fatty acids, typically have long hydrocarbon chains (chains of carbon and hydrogen atoms). A large ring with C and O is more characteristic of carbohydrates (like glucose rings) or other molecules, not lipids. A single C bonded to N and H is an amino group - related to proteins/amino acids. A chain of C bonded to N and P is more like a nucleic acid component (phosphate - nitrogenous base - sugar, but not lipid). So the correct option is the one with a long chain of H and C atoms.

Answer:

A. a long chain of hydrogen and carbon atoms