Starch solution

In part I, a dialysis bag with two pipettefuls of glucose and starch solution was mixed. The bag was placed in a beaker of tap water and I2KI solution for 30 minutes. The contents of the bag and the beaker were placed in test tubes and tested through Benedict’s Test for the presence of aldoses - both test tubes tested positive. What was happening when the dialysis bag was in the beaker? The dialysis bag’s material acted as an artificial “membrane”, exercising selective permeability (allowing certain

Concentrations of Starch and Sugar Solutions on Synthetic Semi- Permeable Membranes Question: Is dialysis tubing selectively permeable? Hypothesis: If one has dialysis tubing, which is dipped in water, filled with Gatorade and starch and is left for 15 minutes, the sugar in the Gatorade will exit the dialysis and into the water. So the dialysis is semi-permeable. Materials: 16 cm dialysis tubing beaker cylinder test tubes transfer pipettes Gatorade Starch solution     10

experiment, we wanted to determine the starch and glucose content of different plant parts including: fruits, stems, leaves, and roots. To do this, we tested a food in each of these categories with Lugol’s and Benedict’s solutions after being heated in a hot water bath. The color of each solution would then be compared to the Lugol’s and benedict’s indicators to determine how much starch and glucose is in each. We believed that fruits would have the most starch and glucose out of the plant parts because

The Effects of pH levels on Porcine Pancreatic Alpha Amylase Activity in a 1% Starch Solution Introduction Enzymes are protein complexes which lower the amount of energy needed to complete chemical reactions in cells, and therefore, increase the rate of chemical reactions. Without enzymes, chemical reactions in the body would occur at much slower rates, they are critical to cell function. The enzyme used in this experiment, alpha-amylase, is a catabolic enzyme found in two places within the body:

activity. the relative activity of Amylase is found by noting the time taken for the starch substrate to be broken down, that is, when it is no longer gives a blue-black colour when tested with iodine solution. This time is referred to as the achromatic point. Equipment: v Amylase solution 0.1% v Starch Solution 1.0% v Distilled water v Iodine in potassium iodine solution v White tile and polythene pipette v Graduate pipettes or syringes v

     CHEM 1021  BREAKING DOWN STARCH USING SALIVARY AMYLASE  Caution:    You  will  be  using  a  Bunsen  burner  and  glassware  to  create  your  own  constant  water  bath.   Appropriate  caution  should  be  exercised  when  dealing  with  the  Bunsen  burner,  hot  water,  and  glassware.  Purpose:  Many plants store their energy in the form of starch, a polysaccharide made from repeating  units of the monosaccharide glucose.  Our bodies break down starch into the individual glucose units

In Table one the solution remained brown since there is no starch present in the mixture in tube 1A.The solution turned blue black due to presence of starch in the solution in tube 2A.The solution remained brown since there is no starch present in the mixture in tube 3A.The solution turned blue black due to presence of undigested starch in the solution. Boiling amylase denatures the enzyme hence it cannot digest amylase in tube 4A.The solution remained brown since there is no starch present in the

toothpicks. 3. Observed reactions and recorded in the table below. Cleaned out the 5 test tubes. Data: Iodine Test Results Discussion: The iodine test was successful. Potato juice and starch were the only two substances containing starch. Again, glucose and onion juice contains glucose, while water doesn't contain starch or glucose and was just tested to make sure the test was done properly. SUDAN III TEST Introduction: Sudan III test detects the hydrocarbon groups that are remaining in the molecule

pH buffers to amylase on the rate of starch digestion measured using starch and iodine? Background information: pH is a measure of the concentration of ions in a solution. In other words, concentration of H+ and OH molecules compose pH. When the concentration of H+ and OH ions are balanced (equal), the solution is considered neutral. When the H+ dominates the OH molecules, the solution is considered acidic. When the OH dominates the H+ molecules, the solution is considered basic. Buffer is to

examining the chemical changes and analyzing the results based on the properties of known solutions and macromolecules. This lab, identifying organic macromolecules, focuses primarily on the colour changes of the solutions and the molecular changes that lead to these physical changes. Iodine Test Two common polysaccharides, starch and glycogen, serve as energy storage molecules in plants and animals respectively. Starch consists of two major polysaccharides: amylose and amylopectin, both of which are composed