Waxes are biologically important to plants and insects because they
Correct answer: A. form waterproof coatings on leaves, fruits and exoskeletons
- A. form waterproof coatings on leaves, fruits and exoskeletons
- B. store more energy per gram than any other molecule
- C. build the phospholipid bilayer of membranes
- D. act as receptors for hormones
Explanation
Waxes are highly hydrophobic, so the cuticle on leaves and the wax layer on insect exoskeletons prevent water loss and resist wetting. Energy storage is the role of fats, membranes are built from phospholipids, and receptors are proteins.
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About Classification of Biological Molecules
Biological molecules are classified as carbohydrates, lipids, proteins and nucleic acids, with water, minerals and vitamins also supporting cellular processes. The key distinctions involve their monomers, chemical bonds, structures and functions, including glucose and starch, fatty acids and triglycerides, amino acids and polypeptides, and nucleotides in DNA and RNA.
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