Why Are Fats a Better Source of Energy Than Carbohydrates

question 21

Multiple Choice

Why are fats a better source of energy than carbohydrates on a per carbon basis?

• A) Fats are comprised of other atoms besides carbon and oxygen that increase its ATP yield.
• B) Fats have more hydrogen bond in its fatty acid chains, which allows them to react more with oxygen.
• C) Fats do not completely break down, and the by-products increase ATP yield.
• D) Fats require fewer reactions with oxygen to completely break down, thus increasing its ATP yield.
• E) Fats require more reactions with oxygen to completely break down.

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Definitions:

Endodermal Cells

Cells originating from the innermost layer of the embryo, which give rise to the lining of the digestive and respiratory systems.

Casparian Strip

A band of cell wall material found in the roots of plants, acting as a barrier to the passive flow of substances.

Xylem

The vascular tissue in plants that conducts water and dissolved nutrients upward from the root and also helps to form the woody element in the stem.

Phloem

The vascular tissue in plants that transports sugars and other metabolic products downward from the leaves.