Aim: To observe and describe an example of osmosis. Hypothesis: I predict that the water level will rise as the iodine stained water moves through the cellulose bag due to osmosis. The iodine is there so we can see this happening. Materials: * Dialysis(cellulose) tubing * Thistle funnel * Gas jar * Retort clamp and stand * Rubber bands * 50mL beaker * Iodine/potassium iodine solution * 5% starch solution Method: 1) Fill the gas jar to 3 quarters full with
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DILUTIONS AND STANDARDS Many of the laboratory procedures involve the use of dilutions. It is important to understand the concept of dilutions‚ since they are a hand tool used throughout all areas of the clinical laboratory. These dilutions have to be considered as they make a quantitative difference in what is going on. First‚ there are several terms used in expressing dilution: 1. "Dilution: - Dilutions are expressed as the ratio of the quantity of a desired solute (serum‚ urine‚ chemical solution
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they would perish. Duckweeds are those types of plants that require fertilizers for the development of their roots‚ and Phosphorus fertilizers are the ones who have this ability. On the other hand‚ Nitrates or Nitrogen fertilizers in an excessive concentration would give an excessive amount of proteins to the duckweeds which would not be needed by them and hence concentrated nitrogen won ’t be that helpful for their growth. Tap Water would also be a good fertilizer for the duckweeds since it contains
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membrane because Your answer : a. they are not lipid soluble. Correct answer: d. they are lipid insoluble or they are too large. 2. Which of the following is true of facilitated diffusion? You correctly answered: c. Movement is passive and down a concentration gradient. 3. Examples of solutes that might require facilitated diffusion include Your answer : a. glucose. Correct answer: d. all of the above. 4. Which of the following would not affect the rate of facilitated diffusion? You correctly answered:
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Name:David B. Victorioso Year/section:IV-Acacia Date:Saeptember 16‚2013 Teacher:Mrs.Noceda Age Problem Problem 1 An eagle is 4 times as old as a falcon. Three years ago‚ the eagle was 7 times as old as the falcon. Find the present age of each bird. Solution x = falcon’s age now 4x = eagle’s age now {the eagle is 4 times as old as falcon} x - 3 = falcon’s age 3 years ago 4x - 3 = eagle’s age 3 years ago 4x – 3 = 7(x – 3) {three years ago‚ eagle
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this lab to be able to efficiently explain what is happening to the cells. Diffusion is the tendency of a substance to move down its concentration gradient from a more concentrated to a less concentrated area. Facilitated diffusion is the spontaneous passage of molecules and ions bound to a specific carrier protein across a biological membrane down their concentration gradient. Active transport is the movement of a substance across a biological membrane
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What amount of amylase is the best to produce a better reaction with starch? A 1% solution of amylase‚ made from 0.15g of amylase added to 15ml of water‚ a 2% solution of amylase made of 0.3g of amylase added to 15ml of water‚ and a 0.5% solution of amylase made of 0.75g of amylase to 15ml of water were created. A 0.25% starch solution was also created‚ and 3ml was added to each of the 4 test tubes. 1 drop of iodine was added to each test tube. 4ml of the 1% solution was added to the first test
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will be investigating what effects the movement of water through osmosis. Osmosis is the diffusion of water. It is the process in which fluids pass through a partially-permeable membrane. It is the movement of water from high water concentration to low water concentration. Plant cells react to osmosis by hypertonic‚ isotonic and hypotonic. Keywords Hypertonic – is when the water outside of the cell is lower than that inside. Isotonic – is when the net movement is the same in both directions.
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new egg volume. Finally the egg was submerged in water for 1-24hrs‚ again the volume was measured and recorded. I then compared the three volume measurements and provided observation. The next experiment was to determine the effects of salt concentration on bacterial growth. The tubes of broth were labeled as directed and
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across a membrane because You correctly answered: d. they are lipid insoluble or they are too large. 2. Which of the following is true of facilitated diffusion? Your answer : b. Movement is active and against a concentration gradient. Correct answer: c. Movement is passive and down a concentration gradient. 3. Examples of solutes that might require facilitated diffusion include Your answer : a. glucose. Correct answer: d. all of the above. 4. Which of the following would not affect the rate of facilitated
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