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A Lab on diffusion and osmosis. Basically, we had a15ml strip of dialysis tubing that was soaked. We tied a knotto form a sack. We added 3ml of starch, gelatine (protein),glucose and NaCl into the sack and we tied the sack with another knot. We rinsed it with a little water and placed it into a250ml beaker with distilled water. We heated it to37oCelsius. We waited for 30 minutes for themolecules to move out of the sack and into the surrounding waterbath. While waiting, we tested indicators to determinewhether a certain molecule has moved through the semi permeablemembrane. We removed 80ml of water from the beaker anddistributed 20ml into each of 4 beakers.Indicators--glucose-benedict's soln, NaCl-AgNO3,starch-iodine, protein-biuret solnThere was a presence of glucose and NaCl in the water bathwater when we tested using indicators.questions...a)tyrosine is an amino acid. If we added an enzymeinvolved in the digestion of proteins to the dialysis sack, wouldyou expect to get a positive test for tyrosine in the water bath?Explain.b)in a cell, turgidity is due to internal pressure. Describe the state of turgidity of the dialysis sack over theduration of the investigation. If there were changes,describe why they occured.c)over a long period of time, you may see the presence of somestarch in the water bath. Give 2 possible explanations.d) suggest a reason why quick movement of each molecule intoor out of a cell might be important in functions within the humanbody.
An single-celled organism found in the Antarctic is adapted to low-temperature conditions. Which of the following adaptations is this cell likely to have?
The exzyme-catalyzed conversion of a substrate at 25C has a Michaelis constant of 0.035 ml/L. The rate of the reaction is 1.15*10^-3 mol/Ls when the substrate concentration is 0.11 mol/L.
liquid portion of blood is known as ______. Most of the plasma comprises of ______ that serves as a solvent and carries heat. ______ like sodium, potassium and ______ serve to manage the osmotic balance in the blood.
How would the plan clearly explain the concept of infectious diseases and how it progresses?
what are the difference in shape and arrangement (only) between: diplococcus, staphylococcus, and stretococcus?
The genes for mahogany eyes and ebony body are approximately 25 map units apart on chromosome 3 in Drosophila. Assume that a mahogany-eyed female was mated to an ebony- bodied male and that the resulting F1 phenotypically wild-type females were ma..
hypercholesterlemia is a genetic diease that affects 1 out of 500 people worldwide. this is more that one genetic cause of the disease. Class 1 is described as an autosome dominant disease.
Why would extensive secondary growth in stems of annual plants be a "poor investment" for the plant?
Which of the following stages in the Calvin Cycle require(s) both ATP and NADPH?
Assume you are creating a solution and the recipe calls for 25 ml of 10 percent glucose. How much of the 3M glucose stock would your need to add to so that you are adding the same molar amount of glucose?
q1. one slice of cheese pizza contains 290 calories 15 g of protein 9 g fat and 39 g of carbohydrates. one half cup of
Describe the structure of the sarcomere of a skeletal muscle myofibril and the changes that occur during its contraction.
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