to learn basic laboratory techniques‚ such as handling the reagents‚ using Gilson pipettes etc‚ study and try to identify chemical tests for food compounds. Materials and methods Reagents Monosaccharaides (glucose‚ fructose‚ maltose)‚ sucrose (disaccharide) Starch (polysaccharide)‚ egg albumin (protein) DCPIP‚ Vitamin C Olive oil + Sudan III Ethanol (highly flammable) Iodine solution (irritant) Benedicts reagents KOH + CuSO4 HCl (irritant) Honey solution Apple juice solution Milk solution Precautions
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molecule – monomer Repeating molecules – polymer Single monomer – monosaccharide Pair of monomers – disaccharide Large no. of monomers – polysaccharide Monosaccharides – General formula (CH2O)n Best known monosaccharide – C6H12O6 H O H HO OH Test for reducing sugars (Monosaccharide’s and some Disaccharides) * Add benedicts
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Indicate whether each of the following statements about triglycerides is true or false. Indicate whether each of the following statements about triglycerides is true or false. 1. A triacylglycerol is composed of 3 glycerol molecules joined to a fatty acid. 2. The hydrocarbon chains of fatty acids vary in length as well as in the number and location of double bonds between the carbon atoms. 3. Fatty acids with one double bond in their hydrocarbon chain are called monounsaturated‚ while those with
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1.*A decrease in total plasma volume results from the: antidiuretic hormone mechanism 2. *A hematocrit of 56% would be an indication of: polycythemia 3. *A hematocrit value of 38 ml/ 100 ml of blood would be: in the low normal range for a woman 4. *A normal adult red blood cell count ranges from: 4.2 to 5.8 million/ cubic mm 5. *A person with thymus malfunction would: produce fewer T cells‚ thus reducing the effectiveness of the immune system. 6. *After birth‚ the umbilical vessels remaining
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many people in third world nations. Potatoes are full sucrose used for energy storage in plants. Sucrose is a carbohydrate or sugar found in food. It’s a combination of fructose and glucose two simple sugars‚ making it a disaccharide. Consumers break down sucrose a disaccharide into two monosaccharide‚ so they can be absorbed easier and quicker into the blood. Without being broken down sucrose is too large of a molecule to diffuse through semi permeable membrane and wouldn’t be able move in and out
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called dextrins and maltose(disaccharide maltose). Once the food reaches the stomach‚ the acid in the stomach inactivates all salivary amylase. Carbohydrate digestion is not conducted the stomach for this reason. Before the food approaches the small intestine‚ the pancreas secretes pancreatic amylase. The pancreatic amylase digests starch into maltose. The enzymes maltase‚ sucrose‚ and lactase mucosal cells located at the lining of the intestinal track‚ break disaccharides into monosaccharides. Maltose
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Research report Water is very important .We need water to drink‚ to wash our hands‚ to cook‚ to water plants and many other things. Without water‚ the plants would die and people and animals would go thirsty. What is water? Water is made up of two hydrogen atoms‚ and one oxygen atom. When these atoms come together‚ they form a strong bond that can’t be broken. What is Table salt? Sodium chloride Designed for cooking Has many ingredients 1. Potassium iodine- stabilizer
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ABCT 1101/ABCT1D04 Introductory Life Science INTRODUCTORY LIFE SCIENCE At our 3rd lecture‚ we want to discuss • The building blocks of biological organisms – Carbohydrates‚ proteins‚ lipids and nucleic acids • Cell structure and function – Cell membrane‚ ER‚ Golgi‚ cytoskeleton‚ nucleus – Plant cell vs. animal cell Simple Chemistry for Life Science • Each element consists of one kind of atom. – An atom is the smallest unit of matter that still retains the properties of an element
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Lipids and Phospholipids The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The head which is hydrophilic contains a group of phosphate‚ a diglyceride and a simple molecule e.g. choline. The tail is hydrophobic and is made up of fatty acids. Phospholipids receive and transmit signals across the cell membrane and act as a store room for energy. The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The
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Introduction: Lactose intolerance is defined as the incapacity of the human body to digest the disaccharide sugar molecule‚ lactose. Lactose is a common carbohydrate found primarily in milk and associated dairy products. This widely known gastrointestinal disorder is typified by symptoms like nausea & vomiting‚ bloating‚ flatulence‚ abdominal pain and even diarrhoea. Lactose intolerance is a non-fatal disorder of the gastrointestinal tract. It is simply a nuisance and relatively harmless in and
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