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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.
If you cross a true-breeding dominant plant with a true-breeding recessive plant, what will be the phenotype of the resulting progeny?
choose one of the following foodborne illnesses to complete this assignment bull salmonella bull
All of the intermediates in the glycolytic pathway are phosphorylated. Give three plausible reasons why this might be advantageous to the cell.
The response to epinephrine to stimulate glycogen breakdown involves which of the following steps?
What do you suppose happens in mutant cells with the following defect? mutation in the Myc promoter such that there is a large increase in transcription.
plan the structure again (showing all bonds), and this time indicate the H bonding of dihydroxyacetone to water. Remember which atoms form H bonds -- you've seen this "rule" several times. Also, each (uncharged) oxygen atom participates in 2 H bon..
What is the difference between geometric and exponential growth and what factors limit exponential growth (carrying capacity) resulting in logistic growth?
Some snakes move into a particular area.Over time , one group ofthese snakes becomes active only at night;another group is activeonly during the day.
The expression and purification of rGFP started with the increase of the bacterial culture and ended with elution of rGFP off the Ni+2 agarose coloumn.
How did the surface area affect the diffusion of the cube.
Cephalochordates and placental mammals both have microlecithal eggs, yet mammalian early development resembles that of birds more than that of amphioxus.
Please try to help to understand how to prepare the following dilutions that are listed below. I need help understanding dilution and how to prepareit.
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