Structure And Function Of Biomolecules Biology Essay

All Biomolecules have certain functions and these molecules all have a unique structure which explains why they function in these ways. These molecules are known collectively as macromolecules, these molecules are grouped into four main categories which each have there own composition. These structures are the key to the macromolecules functions as each of them do a specific task in the torso.

Macromolecules are grouped into glucose, nucleic acids, protein, and lipids. Generally macromolecules are polymers, which really is a long molecule which are made by linking alongside one another a large amount of small, similar materials called monomers. Polymers are shaped by the dehydration response, this happens by the -OH group being taken off one monomer, and a hydrogen atom (H) is taken off the other monomer, then the polymer is created (as shown in Amount 1).

This response is also found in the linking of fatty acids to glycerol in lipids. This response is referred to as a condensation or dehydration effect, because the effect produces a normal water molecule from the -OH and -H organizations removed, and for each monomer that is added a water molecule is given off. The opposite reaction is the hydrolysis reaction which reduces polymer to there respective monomers. Drinking water is added to the macromolecule splitting the bonds between your monomers and the -OH and -H are mounted on form the monomers (just as Shape 2).

Carbohydrates are a group of molecules manufactured from carbon, hydrogen, and oxygen in a molar ratio 1:2:1. Sugars have an over-all solution of (CH2O)n, where n is the number of carbon atoms. These carbohydrates contain a whole lot of carbon-hydrogen bonds, which releases energy when oxidation occurs, as carbohydrates are well suited for energy storage. Sugar are some of the most important energy sources plus they exist in a number of different varieties, such as monosaccharides, disaccharides and polysaccharides. Monosaccharides will be the simplest of carbohydrates, they may contain as few as three carbons but the ones that have a key role in energy storage have six carbons. Disaccharides provide as transport substances in plants and offer nutrition in pets or animals; they are being used by plants for transporting blood sugar around the vegetable as disaccharides are not easily metabolised, but disaccharides are usually used by humans and pets. Polysaccharides provide energy storage space, such as starch consists totally of ±-blood sugar molecules connected in a long chain. Cellulose is a structural polysaccharide which also contains glucose connected in long chains, but these substances are †-sugar. Carbohydrates are used as a way to obtain energy for processes in the body such as muscle movement (Raven et al 2008).


Proteins are linear polymers consisting of a combo of 20 different proteins, that have amino group (-NH2) as well as an acidic carboxyl group (-COOH). The specific order of proteins determines the protein structure and function. The amino and acid carboxyl group go through a dehydration a reaction to form a peptide bond which joins the proteins together to create proteins. Proteins have many different functions that happen to be positioned into seven categories; Enzyme catalysis, Support, Defence, Motion, Transport, Legislation and Storage. Enzyme catalysis is when enzymes which are globular protein with a three-dimensional form that fit around some substances to facilitate chemical type reactions (Raven et al 2008). Support protein fibres play a structural role, these fibres include keratin in head of hair fibrin in blood clots and collagen which sorts the matrix of skin area, ligaments, tendons, and bone fragments, and is the most considerable proteins in a vertebrate body (Raven et al 2008). Defence proteins are globular and use there form to "recognise" international microbes and cancers cells, these cell-surface receptors are from the key of your body's endocrine and immune system (Raven et al 2008). Muscles deal through the sliding movement of two types of protein filaments: actin and myosin (Raven et al 2008). A variety of globular proteins move small substances and ions. The transfer health proteins Haemoglobin, for example, transports air in the bloodstream (Raven et al 2008). Small protein called hormones serve as intercellular messengers in family pets. Proteins also play many regulatory assignments within the cell-turning on and shutting off genes during development (Raven et al 2008). Calcium mineral and iron are stored by binding as ions to storage protein (Raven et al 2008).


Lipids are mixed in structure and function, almost all of them are non soluble in drinking water. Lipids employ a high proportion of nonpolar carbon-hydrogen bonds; such a long time string lipids cannot fold up just like a necessary protein to sequester their nonpolar helpings away from the encompassing aqueous environment. Lipids are hydrophobic so when they are exposed to water there hydrophilic (polar) parts of the lipids cluster collectively as the hydrophobic (nonpolar) parts gather together with the inside the polar portions to stay from the water. Fatty acids and natural oils are a type of lipid which are made from glycerol and three fatty acids. Essential fatty acids are long chain hydrocarbons with a carboxylic acid (COOH) at one end. Fats and oils, also called triglycerides, can be saturated where the fatty acids contain at least one carbon to carbon double bond or they can be unsaturated this means there are no two times bonds. Phospholipids are also lipids and they are made up of a polar mind, a phosphate group, glycerol, and two essential fatty acids. Phospholipids form the cell membranes and they use the previously mentioned method for keeping together cells. The hydrophobic minds gather for the water inside and outside the cell creating the membrane, which certain molecules can go through to get inside or beyond your cell.

Nucleic Acids

Nucleic acids are polymers of nucleotides and each nucleotide is made up of a sugar, basics and a phosphate group. Nucleic acids will be the information having devices of each cell formulated with the code for all those proteins. You will find two main types of nucleic acid which are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Unique among macromolecules, nucleic acids have the ability to provide as a template to make a perfect replicate of computer. DNA is usually found in the nucleus of skin cells, which provides the genetic information essential to build specific microorganisms (Raven et al 2008). Cells use RNA to learn the DNA's encoded information and to steer the creation of the protein. RNA and DNA are similar in structure and consist of duplicate copies of parts of DNA. The duplicates serve as a blueprint specifying the amino acid sequences of the protein. Furthermore to providing as subunits of DNA and RNA, nucleotide bases play other critical assignments in the life span of your cell. For instance adenine is a key component of the molecule adenosine triphosphate (ATP), the currency of a cell (Raven et al 2008). Two other important nucleotide-containing substances are nicotinamide adenine dinucleotide (NAD+) and flavin adenine dinucleotide (FAD). These substances work as electron carriers in a variety of cellular processes (Raven et al 2008).

So Biomolecules have certain functions that they carry out in the torso because of there unique buildings. These set ups are unique as they contain certain bonds between substances which are all shaped in similar reactions. But the four groups of macromolecules are formed in similar reactions, dehydration and hydrolysis reactions, however they all act in several ways.

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