8
lesson pretestMultiple Choice

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Question 8 • CMS 2026-2027 Biology CREDIT RECOVERY

The chemical formula for the major component of palm kernel oil is CH sub 3 open paren CH sub 2 close paren sub 14 CO sub 2 cap h The chemical formula for the carbohydrate glucose is cap c sub 6 cap h sub 12 cap o sub 6 Which statement best describes these macromolecules as foods?

Answer
A
Palm kernel oil would provide a quicker energy source than glucose because it has more carbon atoms that can be used.
B
Glucose is the only one that would provide energy to living things because it is a key product of respiration.
C
Glucose is a better energy source because it is the only one that can be broken down by living things.
D
Palm kernel oil would provide more energy than glucose because it contains more carbon bonds, which release energy when broken.

Explanation

Palm kernel oil is a lipid with a long chain rich in carbon and hydrogen, while glucose has a smaller carbon-based structure. When living things oxidize these molecules, the oil’s many energy-rich bonds allow it to provide more energy per gram than glucose. Strictly speaking, breaking bonds alone takes energy; energy is released overall during the chemical reactions that oxidize the food. Glucose can also provide energy, so the claims that only glucose is usable or that oil is a quicker energy source are incorrect.

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