Waterproof surfaces like cuticle of leaf and protective covering of an insect's body are
Correct answer: B. Waxes
- A. Phospholipids
- B. Waxes
- C. Terpenoids
- D. Acylglycerols
Explanation
Cutin in leaves and exoskeleton of insects is made up of wax. Cutin and suberin are complex bio polyesters composed of fatty acids and aromatic compounds. Cutin is the major component of the cuticle, the waxy, water-repelling surface layer of cell walls exposed to the environment aboveground An insect's exoskeleton (integument) serves not only as a protective covering over the body, but also as a surface for muscle attachment, a water-tight barrier against desiccation, and a sensory interface with the environment.
This question appeared on the UHS MDCAT 2014 paper, which you can sit online with every answer explained.
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About Lipids
Lipids include fats, oils, waxes, phospholipids and steroids, which are largely insoluble in water and soluble in organic solvents. Coverage includes glycerol and fatty acids, ester bond formation, saturated and unsaturated fats, triglyceride functions, and phospholipids in cell membranes.
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