ABSTRACT The effect of co-factor (MgSO₄) and the nature of substrate on the rate of cellular respiration in yeast were determined using two different set-ups. In the first set-up‚ two test tubes were used where one contains 7m and the other with 7 mL 0.2M MgSO₄ and both containing 7mL 10% yeast suspension. Here‚ data shows that the H₂O mixture showed higher amount of CO₂ evolved than MgSO₄. In the second set-up‚ six Smith fermentation tubes were used each containing different 15mL solution (starch
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Fly lab report p. 2 To feed on materials that are healthy for them‚ flies (order Diptera) use taste receptors on their tarsi to find sugars to ingest. We examined the ability of blowflies to taste monosaccharide and disaccharide sugars as well as saccharin. To do this‚ we attached flies to the ends of sticks and lowered their feet into solutions with different concentrations of these sugars. We counted a positive response when they lowered their proboscis to feed. The
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Negative result: No precipitate Bial’s Test Tests for: Pentoses (+)‚ Other (–) Positive result: Change in color to cloudy dark blue Negative result: Not cloudy dark blue Barfoerd’s Test Tests for: Monosaccharides (+)‚ Disaccharides (–) Positive result: Red precipitate Negative result: No precipitate Seliwanoff’s Test Tests for: Fructose (+)‚ Other (–) Positive result: Change in color to orange
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Title: Investigation of action of saliva and hydrochloric acid in two carbohydrate solutions. Objective: To determine the action of amylase and hydrochloric acid in two carbohydrates solutions Apparatus and equipments: 1. Boiling tube 2. Metal test tube racks 3. Beaker 4. Graduated plastic dropper 5. Water bath‚ ~37ᵒC 6. Water bath‚ ~95ᵒC Materials: 1. Carbohydrate solution A 2. Carbohydrate solution B 3. Benedict’s solution 4. 3M Hydrochloric acid 5. 3M Sodium hydroxide Procedures: 1. Two
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Dialysis of starch‚ glucose and sucrose Introduction: Research question: Does the dialysis tube only allow certain substances to pass through the pores because of their size? Dependent and Independent variables: Independent variables: The temperature of the classroom The size of the molecules The size of the pores in the tube The concentration of the indicators Dependent variables: The substance will either pass the pores of the tube or not The result will vary in darkness (color) Controlled
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University of Phoenix Material Animation: The Digestive System Hydrolysis of Sucrose After viewing the animation‚ answer these questions: 1. The enzyme sucrase breaks the disaccharide Sucrose into two monosaccharides: Glucose ‚ or sugar‚ and fructose ‚ or fruclose sugar. 2. Where does this reaction occur? This reaction occurs on the surface of the instetina epithelial (mucosal) cell surfaces. 3. For hydrolysis to occur‚ the sucrose must bind to what part of the
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_____________________________ Chapter 4 – The Carbohydrates: Sugar‚ Starch‚ and Fiber The Simple Carbohydrates: Sugars Identify food sources for each of the monosaccharides: • Glucose: • Fructose: • Galactose: Identify food sources for each of the disaccharides listed: • Sucrose: • Lactose: Describe the condition called lactose intolerance. What causes lactose intolerance? Lactose intolerance: Cause: Are there any treatments for lactose intolerance? What foods may be better tolerated
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Sugar’s effect on your health The average American consumes an astounding 2-3 pounds of sugar each week‚ which is not surprising considering that highly refined sugars in the forms of sucrose (table sugar)‚ dextrose (corn sugar)‚ and high-fructose corn syrup are being processed into so many foods such as bread‚ breakfast cereal‚ mayonnaise‚ peanut butter‚ ketchup‚ spaghetti sauce‚ and a plethora ofmicrowave meals. In the last 20 years‚ we have increased sugar consumption in the U.S. 26 pounds
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FACTS ABOUT ASPARTAME. In an even that one wants to make something taste sweeter‚ an individual is faced with two choices; they can either use sugar and sugar alcohols or artificial sweeteners. In choosing to use artificial sweeteners also called sugar substitutes or nonnutritive sweeteners or noncaloric sweeteners‚ one can either use acesulfame K‚ neotame‚ saccharin‚ sucralose and finally Aspartame. Aaspartame is a lab manufactured sweetener that does not exist in the form of a naturally grown
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How Sugar Affects the Body in Motion By GRETCHEN REYNOLDS Gary John Norman/Getty Images Sugar is getting a bad reputation. A cover article in The New York Times Magazine several weeks ago persuasively reported that our national overindulgence in fructose and other sugars is driving the epidemics of obesity‚ diabetes and other illnesses. But that much-discussed article‚ by the writer Gary Taubes‚ focused on how sugars like fructose affect the body in general. It had little opportunity to examine
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