The Food Groups: Food Group Function Used as a long-term energy (much easier to store Lipids (fats & oils) than carbohydrates). Also have a role in protection and insulation Made from single sugars or chains of sugars. They are Carbohydrates used in respiration to provide energy. Broken down into amino acids, which our body absorbs and assembles into new proteins. The proteins are used Proteins for growth and repair. Regulates bowel movement. Sloughs off old lining of Fibre intestine. Essential as a solvent for chemical reactions (e.g. Water cytoplasm), heat loss (e.g. transpiration), transport (e.g. blood) etc Essential for the normal function of some enzymes and Vitamins and Minerals proteins e.g. Fe2+ is an essential part of Haemoglobin and Mg2+ is part of Chlorophyll Components of the main Food Groups: The main food groups are carbohydrates, lipids and proteins. All three groups are made from smaller molecules. Carbohydrates are large molecules made from one or more sugars (e.g. both Starch and Glycogen are both polymers of Glucose) Proteins are polymers of Amino Acids Lipids are made from one molecule and three glycerol fatty acid molecules joined together.
The Food Groups: Food Group Function Lipids (fats & oils) Used as a long-term energy (much easier to store than carbohydrates). Also have a role in protection and insulation Carbohydrates Made from single sugars or chains of sugars. They are used in respiration to provide energy. Proteins Broken down into amino acids, which our body absorbs and assembles into new proteins. The proteins are used for growth and repair. Fibre Regulates bowel movement. Sloughs off old lining of intestine. Water Essential as a solvent for chemical reactions (e.g. cytoplasm), heat loss (e.g. transpiration), transport (e.g. blood) etc Vitamins and Minerals Essential for the normal function of some enzymes and proteins e.g. Fe2+ is an essential part of Haemoglobin and Mg2+ is part of Chlorophyll Components of the main Food Groups: The main food groups are carbohydrates, lipids and proteins. All three groups are made from smaller molecules. Carbohydrates are large molecules made from one or more sugars (e.g. both Starch and Glycogen are both polymers of Glucose) Proteins are polymers of Amino Acids Lipids are made from one glycerol molecule and three fatty acid molecules joined together.
igcse_biology_revision_book.docx