# Question e7642

Aug 3, 2016

All of these are organic compounds which means that they all contain carbon C as their main component element

#### Explanation:

carbohydrates are the classic organic compound. Look at the name carbo(n) and hydrate ( meaning water) carbohydrates are sugar and starches. Glucose sugar has the formula C6H1206. 6 carbons and six waters.

fats are reduced carbohydrates. they have fewer hydrogens but are still mainly made of carbon and oxygen and hydrogen.

proteins are made of carbon, oxygen, hydrogen and nitrogen.
All proteins have an acid part C 02 H and an amino part N H2

Calories are the heat energy produced by the oxidation of the organic compounds. Calories are not made of elements.

Carbohydrates burn quickly releasing the energy normally used by the human body. Fats burn more slowly releasing higher levels of energy needed in colder climates. proteins are used mainly for building body structures but can be used also for energy.

Aug 8, 2016

Proteins, fats, and carbohydrates all contain $\text{C, H}$, and $\text{O}$, plus some other elements. Calories are not compounds, so they contain no elements.

#### Explanation:

Proteins

Proteins consist of long chains of amino acids joined together by peptide bonds.

The 20 common amino acids all have the same structure, differing only in the nature of the $\text{R}$ group.

They all contain $\text{C, H, O}$, and $\text{N}$, and some of them contain $\text{S}$ in the $\text{R}$ groups.

Carbohydrates

A carbohydrate is a biological molecule consisting of $\text{C, H}$ and $\text{O}$ atoms, usually with an $\text{H:O}$ ratio of 2:1, as in water.

For example, glucose is a carbohydrate with the formula ${\text{C"_6"H"_12"O}}_{6}$ or "C"_6("H"_2"O")_6#.

Fats

Most fats are compounds formed by the reaction between glycerol and long-chain carboxylic acids.

They all contain $\text{C, H}$ and $\text{O}$.

Calories

Calories are units of energy. They are not made up of elements.

They measure the amount of energy released when the body uses proteins, carbohydrates and fats as sources of energy.

There are about 9 cal in a gram of fat and 4 cal in a gram of carbohydrate or protein.