A biologist isolates a fatty acid from a plant with a formula 18:3(9,12,15). What type of fatty acid is this?

Which of the following fatty acids has the highest melting point?

A child shows signs of Tay-Sachs disease. Which lipid is abnormally accumulated in the brain?

During soap-making, animal fats are boiled with alkali. This process is called:

Why do triacylglycerols yield more energy per gram than carbohydrates?

A researcher is studying nerve impulse transmission. Which lipid is she most likely to focus on?

If all three fatty acids attached to glycerol are the same, the molecule is classified as:

Snake venom contains phospholipase enzymes that degrade membranes. Which lipid class is primarily affected?

Which phospholipid is also known as lecithin?

You are testing waterproofing in desert plants. Which lipid would you expect to be most responsible for this adaptation?

A biochemist studies a molecule with an 18-carbon backbone containing an amino group. This lipid belongs to which class?

Why do unsaturated fatty acids generally have lower melting points than saturated fatty acids of the same chain length?

Which of the following best explains why cell membranes remain semi-fluid at physiological temperatures?

Spermaceti is a waxy lipid found in the spermaceti organ of sperm whales. It is composed mainly of wax esters rather than triglycerides, and its unique physical properties (solidifying at lower temperatures) made it historically valuable. Which industry made the greatest use of spermaceti during the 18th and 19th centuries?