HUMAN NUTRITION

NUTRITION

LIPIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Why are lipids efficient for energy storage?
A
they are short chains of nitrogen and oxygen.
B
they are medium chains of hydrogen and oxygen.
C
They are long chains of carbon and hydrogen.
D
None of the above
Explanation: 

Detailed explanation-1: -Fats are very compact and light weight, so they are an efficient way to store excess energy. A fat is made up of a glycerol, which is attached to 1 to 3 fatty acid chains. Most of the energy from fats comes from the many carbon bonds in these long, fatty acid chains.

Detailed explanation-2: -Lipids all possess chains of hydrogen and carbon atoms bonded together, called a “hydrocarbon chain.” Lipids are nonpolar molecules, meaning that they do not possess an electrical charge and they are not soluble in water, but they are soluble in organic solvents like alcohol.

Detailed explanation-3: -Because lipids include a high percentage of C-H bonds, which store chemical potential energy more effectively than other molecules, fats have a substantially higher energy density than carbohydrates. Hence, fats contain more energy per gram than carbohydrates.

Detailed explanation-4: -The amount of energy stored as lipids is greater than the amount stored as glycogen since the human body cannot store as much glycogen as lipids can.

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