9c) Cellulose (structural molecule) c) Cellulose (structural molecule). Used by plants to build their cell walls. Main component of dietary fiber.
10LIPIDS (Fats) Lipids make a very varied family of molecules. Found in oils, waxes & fats.
11Structure: Glycerol molecule & up to three fatty acids (saturated or unsaturated) bonded together.
12One glycerol molecule and up to three fatty acids (saturated or unsaturated)
13SATURATED FAT Structural formula of a saturated fat molecule Figure 5.12 Examples of saturated and unsaturated fats and fatty acidsStearic acid, asaturated fattyacid
14UNSATURATED FAT Oleic acid, an unsaturated fatty acid double Structural formulaof an unsaturatedfat moleculeOleic acid, anunsaturatedfatty acidFigure 5.12 Examples of saturated and unsaturated fats and fatty acidsdoublebond causesbending
15Unsaturated fats are found in plant products (olive oil, sunflower oil, margarine, avocado...). A healthier diet choice.Saturated fats are found in animal products (bacon, butter, lard...). A less healthier diet choice (exception: fish).
16Function: long-term energy storage in the form of triglycerides.
28PROTEINSProteins are found everywhere in the body. They account for 50% of a cell’s dry mass, have a huge range of functions and make up an extremely important group of molecules.Found in meat, eggs, milk, cheese...
29Proteins consists of many amino acids bonded together.
31MANY, MANY DIFFERENT FUNCTIONS! 1. Build structures: organs, blood vessels, muscles,nails, hair (ex: keratin, collagen, actin & myosin).2. Defence against infection: antibodies are proteins.3. Transport proteins carry materials around the body(ex: hemoglobin carries oxygen) .4. Chemical control: enzymes are proteins.5. Body control: hormones are proteins.6. Buffer proteins prevent pH changes.
41NUCLEIC ACIDS (DNA & RNA) Big, massive and immovable DNA is an instruction manual for building an organism. RNA is an assistant molecule necessary for the use of DNA.DNA is used to make chromosomes (46 in humans). Chromosomes are divided into genes (approx in humans).Genes store coded information used to build proteins (1 gene=1 protein).