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EUFIC. (2020). The functions of carbohydrates in the body. Retrieved from: https://www.eufic.org/en/whats-in-food/article/the-basics-carbohydrates#:~:text=Introduction,whole%20grains%2C%20fruit%20and%20vegetables.

Khan academy. (2022). Biological macromolecules review. Retrieved from: https://www.khanacademy.org/science/ap-biology/chemistry-of-life/properties-structure-and-function-of-biological-macromolecules/a/hs-biological-macromolecules-review

Khan Academy. (2022). Nucleic acids. Retrieved from: https://www.khanacademy.org/science/ap-biology/gene-expression-and-regulation/dna-and-rna-structure/a/nucleic-acids

LT. (2020). What are lipids? Retrieved from: https://med.libretexts.org/Courses/American_Public_University/APU%3A_Basic_Foundation_of_Nutrition_for_Sports_Performance_(Byerley)/06%3A_Lipids_Basics_-_Another_Energy_Source_for_the_Athlete/6.02%3A_What_Are_Lipids#:~:text=Lipids%20perform%20three%20primary%20biological,)%2C%20phospholipids%2C%20and%20sterols.

NIH. (n.d.). Nucleic acid. Retrieved from:
https://www.genome.gov/genetics-glossary/Nucleic-Acid#:~:text=Nucleic%20acid%20is%20an%20important,cell%20needs%20to%20make%20proteins.

Tomii, K. (2019). Protein property. Retrieved from: https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/protein-property

Veloz, L. (2018). Facts about lipids. Retrieved from: https://sciencing.com/lipids-2720.html

Wayne, R. (2010). Plant Cell Biology. Elsevier Inc. Retrieved from: https://doi.org/10.1016/B978-0-12-374233-9.00002-7

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Protein is one of the ingredients of life, protein is inside the category of albunimous . They are created by a long chain of amino acids . They are organic compounds and are mainly made of carbon, hydrogen,oxygen,nitrogen,sulfur, and phosphorus. There are 4 types of proteins: globular proteins,membrane proteins,fibrous proteins, and intrinsically disordered proteins. Some types of proteins are hydrophobic (Tomi,2019). Proteins are very strong, in consequence they are useful for structural elements in the body, for example, muscles, bones, hair, and connective tissues . Proteins have many uses in the body, this includes: enzymes, hormones, and antibodies. Proteins provide structure and are used to transport materials in cells. Proteins are found in: meat, eggs, and fish (Carr,2018).

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The  main functions of lipids are: They are structural components for cell membranes,they store energy, and they are important signaling molecules. They also protect important organs, they are a high energy source (LT, 2020).

The main function of carbohydrates is to provide energy to the body. Carbohydrates also play an important role in the structure and function of our cells, tissues and organs (EUFIC, 2020).

The main function of nucleic acid is the storage and expression of genetic information, they also regulate cellular activities. This molecule stores information (NIH, n.d.)

The main functions of protein are: they repair and build body´s tissue, make metabolic reactions, and coordinate body functions. Proteins maintain and help tissue grow, they create enzymes, some proteins are hormones, they provide structure, ans transport nutrients around the body (Van De Walle, 2018).

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A lipid macromolecule has building blocks of fatty acids (3 carboxylic acid groups) and glycerol (3 alcohol groups), which provide cells with long-term energy and make up biological membranes. Examples of these lipids are steroids, grease and waxes. (Khan Academy, 2022)

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Proteins are made of amino-acids monomers which are linked with peptide bonds.

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The ester bond forms between fatty acids and glycerol (triglycerides). (study smarter,nd).

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"As new nucleotides are added to a strand of DNA or RNA, the strand grows at its 3’ end, with the 5′ phosphate of an incoming nucleotide attaching to the hydroxyl group at the 3’ end of the chain. This makes a chain, with each sugar joined to its neighbors by a set of bonds called a phosphodiester linkage". (Khan Academy, 2022).

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This type of bond links carbohydrates monomers

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Formation of a triglyceride

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"The phospholipids are polar lipids that contain a glycerol molecule with a phosphate group attached through an ester bond to one carbon, and two hydrocarbon tails". (Wayne, 2010)

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Formation of a protein

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Formation of a Polysaccharide