Investigation Aim I am going to prove that temperature effects the rate in which the enzyme Trypsin breaks down milk substrate into amino acids. Investigation "We strongly recommend the use of Vanish Stain Removal Tablets in conjunction with a 900 spin wash at 70°C" This was found on a milk carton of a well-known drinks company‚ Nesquick. The major food group constituent of milk is‚ of course‚ milk. For my Science Investigation‚ I am going to test different temperatures to see which dissolves the Nesquick
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Bomb calorimeter * Device used to measure total calorie/energy content available from food. * Measured in kilocalories * 1000calories=1 kcal JOULE * Measure of energy in metric system * 1cal/kcal= 4.184joule/kilojoules Fyi: 1 cup of milk 12g carb=48kcal 8 gram protein=32kcal 10 gms fats=90 kcal Total=170 kcal COMPONENTS OF ENERGY EXPENDITURE BASAL METABOLISM * Measure of the energy needed by the body at rest for all its internal chemical activities. * Aprx. 1 cal/kg of body weight
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STANDARD GRADE BIOLOGY CREDIT LEVEL REVISION QUESTIONS INVESTIGATING CELLS 1. In an investigation‚ three 25 g samples of sultanas were put into separate beakers of distilled water‚ as shown below: After 24 hours‚ the sultanas were removed from the water‚ blotted on filter paper and reweighed. The results are shown in the table: |Sample |Mass after 24 hrs (g) |Percentage change in mass | |1
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SCIENCE - FORM 2 Nutrition CLASSES OF FOOD 1. Food is a basic necessity for all living things. 2. Food is important in order to : (a) Provide energy to carry out physical activities. (b) Provide energy for the physiological activities in life such as reproduction‚ digestion and excretion. (c) Build new cells and ti repair tissues in the body.
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E.coli Pink color- positive No pink – negative 13. Starch hydrolysis (iodine)‚ test for enzyme laminase Positive control- B. subtillus Zone of clearing- positive test No zone of clearing – negative test 14. Fat hydrolysis‚ test for enzyme lipase Positive control – S.aureus Dark blue – positive test No dark blue- negative test 15. Casein Hydrolysis‚ enzyme caseinase Positive control – B. subtilus Positive- zone of clearing Negative – no zone of clearing 16 Indole Production
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Fruit is formed by the enlargement of _________. (Stigma‚ Style‚ Ovary) 4. The earthworm belongs to the phylum _________. (Nematoda‚ Annelida‚ Mollusca) 5. The saliva contains an enzyme known as _________‚ which acts on carbohydrates. (Lipase‚ Trypsin‚ Ptyalin) 6. _________ tissues specialize in contraction. (Connective‚ Muscle‚ Nervous) 7. Goitre is caused by the deficiency of _________. (Insulin‚ Glucagon‚ Iodine) 8. There are _________ chromosomes in each cell of a human
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cheese. Rennet contains many enzymes‚ including a proteolytic enzyme (protease) that coagulates the milk‚ causing it to separate into solids (curds) and liquid (whey). They are also very important in the stomach of young mammals as they digest their mothers ’ milk. The active enzyme in rennet is called chymosin or rennin (EC 3.4.23.4) but there are also other important enzymes in it‚ e.g.‚ pepsin and lipase. There are non-animal sources for rennet that are suitable for consumption by vegetarians. Contents
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A) a diet that contains too much fat B) a diet that contains insufficient fat C) a diet that contains too much carbohydrate D) a diet that contains insufficient carbohydrate 13. Which of the following are good sources of fructose? A) milk and cheese B) fruits and honey C) fruits and vegetables D) breads and cereals 14. Jane consumed a breakfast that contained 80 grams of carbohydrate‚ 20 grams of protein‚ and
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Unit 7 A2 applied science Planning and carrying out a scientific investigation Mr Miller In this unit you will learn about: • The stages involved in planning a practical investigation; • How to conduct a practical investigation; • How to record‚ process‚ evaluate and draw conclusions from the data obtained from the practical investigation; • Presenting your practical investigation to a client. Your investigation • You will be investigating the effects of bile ‚ a substance formed in the
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I. Science Fair Question How do digestive enzymes convert sucrose and lactose into glucose? II. Background Research Do you enjoy eating smoothies packed full of berries and other tasty fruits? This paper is going to discuss how digestive enzymes convert sucrose and lactose into glucose. The following terms will discuss; Sucrose‚ Glucose‚ Lactose and Digestive Enzymes. Sugar is any of a class of crystalline carbohydrates such as sucrose‚ glucose‚ or lactose‚ that dissolves in water and have a
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