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The human body has three macromolecule energy sources: carbohydrates, lipids, and proteins. Carbohydrates are made up of many individual sugar units which are linked together in long chains. The chains can be straight, or they can be branched. Carbohydrates have the molecular formula C6nH(10n+2)O(5n+1) so they only contain carbon, oxygen, and hydrogen. Sugars are used for short to intermediate term storage of energy. That's why drinking a sugary drink can give you energy (a sugar rush) for a short time but then it wears off. The amount of energy in sugar is 4 kcal/g.Proteins are usually made of straight chains of linked peptide units. They provide long term energy storage. Proteins contain carbon, oxygen, hydrogen, and nitrogen with small amounts of sulfur with varying molecular formulas. That is why eating a steak will make you feel full for many hours. Proteins are also used to build up many of the structures in the human body so they are necessary to repair damaged tissue. The amount of energy in protein is 4 kcal/g, just like sugar.Fats are made of up clusters of fatty acids, long chains of repeating CH2 units so they are mostly made of just carbon and hydrogen. Fats are used for long term energy storage. Excess sugar and protein that is consumed by most animals are converted to fats to save the energy for later. The amount of energy in fat is very high, 9kcal/g.

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8y ago
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7y ago

Carbohyadrates, but most energy rich are fats.

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8y ago

That is the glucose. It is a monosaccharide

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9y ago

Yes macromolecule such as glycogen and fats are used to store energy for longer period. During fasting, they breaks to form energy. They are regulated by insulin and glucagon hormones.

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8y ago

Glucose is the primary fuel. They are type of monosaccharide

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7y ago

Glycogen, mainly a carbohyadrate.

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9y ago

The main one is glucose.

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11y ago

Mr. Linke?

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10y ago

ATP

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Q: What macromolecules are used for energy?
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Related questions

Which macromolecules can be used for short term energy?

Carbohydrates.


Which class of macromolecules is primarly used as rapidly available energy source by living lings?

They are the lipids. They store a lot of energy


Which macromolecule is used as main source of energy for a cell?

Carbohydrates are the primary source of energy for the body.They are one of the four types of Macromolecules which are: Carbohydrates, Proteins, Nucleic Acids, and Lipids.


What types of macromolecules provide the body with energy?

Energy


How does a red wolf utilize the four macromolecules?

They are used as building blocks for proteins, DNA and energy.


Where does the energy for respiration comes from?

Macromolecules


Why do macromolecules differ in amount of energy they contain?

because different macromolecules have different kinds/quantity of bonds, and these bonds holds energy


Which food contains the macromolecules needed to build muscles but does not contain the macromolecules that give energy quick?

Hamburger


Which macromolecules can be used for long term energy storage in animals?

Glycogen (made up the macromolecule carbohydrates)


Why do Macromolecules differ in the amount of energy they contain?

because different macromolecules have different kinds/quantity of bonds, and these bonds holds energy


Which class of macromolecules us primarily used as a rapidly available source by living things?

They are the lipids. Lipids can store much energy


What two macromolecules are used as the primary source of energy for cellular functions?

The molecule that is the primary source of energy in all cells is ATP, which is definitely not a macromolecule. The molecule that is the primary source of energy in cells for making ATP from ADP is glucose, which is definitely not a macromolecule. Macromolecules that can be metabolized for energy (starches, fatty acids, proteins) are only secondary or tertiary sources of energy as the process of extracting energy from them is slow and inefficient.