Question

Which of the statements are true? 

Unsaturated fats have higher melting points than saturated fats. 

Fats that contain more unsaturated fatty acid residues than saturated fatty acid residues are more likely to be liquid at room temperature. 

Saturated fats are more likely than unsaturated fats to be solid at room temperature.

Triacylglycerols (triglycerides) are composed of fatty acid residues and glycerol. 

Triacylglycerols (triglycerides) always contain three identical fatty acids.

Which of the compounds are nonhydrolyzable lipids? 

Answer 1

Incorrect statement: "Unsaturated fats have higher melting points", in fact, unsaturated fats have low melting points that saturated fats.

Correct statement: "Fats that contain more unsaturated fatty acid residues than saturated fatty acid residues are more likely to be liquid at room temperature".

Correct statement: "saturated fats are more likely than unsaturated fats to be solid at room temperature".

Correct statement: "Triglycerides are composed of fatty acid residues and glycerol", it is the definition of triglycerides.

Incorrect statement: "Triglycerides always contain three identical fatty acids", not necessarily contain three identical fatty acids, it can be altered.

Lipids with ester functional groups undergo hydrolysis. Hence, the following compounds are nonhydrolyzable lipids.

(1) (first compound) CH₃-(CH₂)₁₀-COOH and (4) (last compound) Steroidal molecule.