MCQs

A phospholipid has two fatty acids and one phosphate-containing group attached to glycerol.

Ester linkages form between glycerol hydroxyl groups and fatty acid carboxyl groups.

Pancreatic lipase acts mainly in the small intestine after emulsification by bile salts.

Lipids contain more hydrogen atoms and fewer oxygen atoms, producing more ATP upon oxidation.

Phospholipids form the structural framework of cellular membranes.

Condensation reactions release water during ester bond formation.

Double bonds are the defining feature of unsaturated fatty acids.

Phospholipids exhibit lateral movement, contributing to membrane fluidity.

Each hydroxyl group of glycerol forms one ester bond with a fatty acid.

Glycerol contains three hydroxyl (-OH) groups.

Hydrophobic tails avoid water and remain inside the membrane.

Neutral fats (triglycerides) have three fatty acids and no phosphate group.

Lipase specifically hydrolyzes ester bonds present in triglycerides.

The phosphate-containing head is polar and interacts with water.

Double bonds introduce bends that reduce tight packing of fatty acid chains.

Mixed triglycerides contain two or three different fatty acids attached to glycerol.

Esterification joins glycerol and fatty acids by removing one molecule of water.

Phospholipids arrange into a bilayer with hydrophilic heads outward and hydrophobic tails inward, forming a selectively permeable membrane.