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At what pH values is pepsin likely to be denatured? Justify your answer.
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- Introduction to Experiment 2: Protein Digestion by Pepsin In this experiment, we will look at for evidence of protein digestion using albumin, a protein, and Biuret reagent. Biuret reagent is used to test for the presence of proteins, or more specifically, peptide bonds. When long polypeptide chains are present the solution will turn violet, and when shorter polypeptide chains are present the solution will turn a lighter pink color. What is/are the end product(s) of protein digestion? ____________________________________________________________ What is the purpose of the enzyme pepsin? _______________________________________________________________________ If protein digestion has occurred, will the solution be violet or pink (choose one)? _________________ Hypotheses/Predictions (See Methods section for details): What color do you expect the solution to turn when the P tubes are mixed with Biuret solution and why? P1…Introduction to Experiment 2: Protein Digestion by Pepsin In this experiment, we will look at for evidence of protein digestion using albumin, a protein, and Biuret reagent. Biuret reagent is used to test for the presence of proteins, or more specifically, peptide bonds. When long polypeptide chains are present the solution will turn violet, and when shorter polypeptide chains are present the solution will turn a lighter pink color. What is/are the end product(s) of protein digestion? Amino acids What is the purpose of the enzyme pepsin? It helps in the digestion of proteins by breaking down the peptide bonds between amino acids into smaller peptides If protein digestion has occurred, will the solution be violet or pink (choose one)? Hypotheses/Predictions (See Methods section for details): What color do you expect the solution to turn when the P tubes are mixed with Biuret solution and why? P1 P2 P3 P4 The least protein digestion (or none at all) will take place in tubes…Introduction to Experiment 1: Starch Digestion by Amylase In this experiment, we will look for evidence of starch digestion by testing solutions for the presence of starch and sugars. When starch s present the lodine in Lugols solution turns the solution black, blue, or dark beown If starch is not present, lodine will dye the solution a yellow color. Benedict's reagent reacts with freducing sugars, Includinggucose, resulting in a green, orange, or red color. If sugars are not present, Benedict s reagent remains a light blue color. 1. What is/are the end product(s) of starch digestion? 2. What is the name of the enzyme that digests starch (amylose)? Hypotheses Predictions (See Methods section for details) 1. When mixed with Lugols solution, test tube Al (amylase only) will have what color and why? 2. When mixed with Benedict's solution, test tube Al (amylase only) will have what color and why? 3. When mixed with Lugols solution, test tube A2 (starch only) will have what color and why?…
- Complete the following table. Enzyme Salivary Amylase Lipase Pepsin Lactase Peptidase Function Select one: digests lipids digests polypeptides digests starch digests proteins digests lactose a. peptides and glycerin b. glycerol and glycogen c. amino acids and glucose d. reassembled triglycerides Optimum pH for enzyme function Secreting organ ¶ ( > he glycerol and fatty acids are absorbed into the cells of the villi by which they transport to the blood vessels inArrange the following statements regarding the processes of protein metabolism starting from Step 1 to Step 10. Conversion of pepsinogen to pepsin by HCI • Active transport takes place • Conversion to individual amino acids Glutamate becomes alpha-ketoglutarate Mechanical digestion to go to the small intestines • Shuffling of amino group to generate glutamate • Conversion of proteins to simpler polypeptides Removal of basic and acidic functional groups Enters the Kreb Cycle • Acidic denaturation and hydrolysis of proteinsPepsin hydrolyzes proteins in the stomach. The pH in the stomach is 2, and the optimum pH for pepsin is 2. What do you think would happen to the activity of pepsin when it reaches the small intestine, where the pH is 8? Explain why.
- enzyme activity diagram poster showing salivary, gastric and intestinal digestion processesIntroduction to Experiment 1: Starch Digestion by Amylase In this experiment, we will look for evidence of starch digestion by testing solutions for the presence of starch and sugars. When starch is present, the iodine in Lugoks solution turns the solution black, blue, or dark brown. If starch is not present, iodine will dye the solution a yellow color. Benedict's reagent reacts with "reducing sugars," including glucese, resulting in a green, orange, or red color. If sugars are not present, Benedict's reagent remains a light blue color. 1. What is/are the end product(s) of starch digestion?. 2. What is the name of the enzyme that digests starch (amylose)? Hypotheses/Predictions (See Methods section for details): 1. When mixed with Lugol'ssolution, test tube A1 (amylase only) will have what color and why? 2. When mixed with Benedict's solution, test tube A1 (amylase only) will have what color and why?. 3. When mixed with Lugols solution, test tube A2 (starch only) will have what color…SHOW/IDENTIFY the arrow pushing mechanism in at least 4 steps. -20,POCH, 6 -P0,POCH, 1 H H phosphoglucose isomerase (PGI) CH2OH H 1 5 н но 2 ОН H H ОН 13 ОН 2 ОН НО НО H H Glucose-6-phosphate (G6P) Fructose-6-phosphate (F6P)
- Using the standard curve for the digestion of amylose producing maltose (Figure 13, Workshop 4 manual), determine the amount of maltose produced for each of the conditions (Tubes 2-10). Assume that these values are the amount of product (maltose) produced per unit time (e.g., mM per second) or enzyme velocity Absorbance (545 nm) Maltose (mM/sec) 0 0 0 0.040 0.210 0.330 0.295 0.280 0.202 0.030choose the correct answer(s) bellow: * Glucose Fructose Galactose Brush + border on luminal surface Na ATP 3Na* Fructose Glucose Galactose Na'-K' ATPase (dwnd y-.eN) ADP + P, 2K Circulation None of the above Fructose enters the intestinal mucosal cell via GLUT-5. Glucose and galactose are transported into the intestinal mucosal cell by SGLT-2 All of the above The GLUT-2 transporter is the protein allows for the transport of glucose, galactose, and fructose into the portal circulation.Introduction to Experiment 1: Starch Digestion by Amylase In this experiment, we will look for evidence of starch digestion by testing solutions for the presence of starch and sugars. When starch is present, the iodine in Lugol’s solution turns the solution black, blue, or dark brown. If starch is not present, iodine will dye the solution a yellow color. Benedict’s reagent reacts with “reducing sugars,” including glucose, resulting in a green, orange, or red color. If sugars are not present, Benedict’s reagent remains a light blue color. What is/are the end product(s) of starch digestion? _____________________________________________________________ What is the name of the enzyme that digests starch (amylose)? ________________________________________________ Hypotheses/Predictions (See Methods section for details): When mixed with Lugol’s solution, test tube A1 (amylase only) will have what color and why? _____________…