AS biology cw introduction/conclusionWatch
which brings me onto the conclusion.....what do we write in it? do we have to do the whole ..."if i repeated this study i would change this... " because we dont actully carry out the study so how can we draw up a results table and graph if we have no results. oh and if anyone knows what a colourimeter measures in then plz let me know. thank uuuuuuuuu. emma xx
Egg Albumen is a globular protein held together by interaction between R groups.
Some of the bonds between R groups are Ionic, i.e. a positively charged R group is attracted to a negatively charged R group and the force of attraction holds the shape of the protein.
Copper sulphate dissociates into Ions in solution. These Ions are also attracted to the charged R groups. The positive Copper ions are attracted to negative R groups, the Sulphate ions to the positive R groups.
These ions neutralize the charge on the R groups so that the R groups no longer bind to each other. This makes the protein uncoil into long strands. Some of the bonds in the protein strand are polar, slightly charged at one end.
H groups are slightly positive, and become attracted to the slightly negative O end of OH groups. As the protein has uncoiled the H and OH groups are free to line up.
The resulting hydrogen bonds cause the molecules to stick together. It is this more compact, regular arrangement of molecules that makes the albumen white.
Instead of using a colorimeter you can compare the amount of albumin that has been denatured with a solution that is obviously denatured for example 0.1 concentration of copper sulphate should be enough.
im not sure how to measure the precentage of the albumen denatured can u help me???
and no colourimeters do not work
alternativly i guess u cud just hold it up and c if u can c thro it 4 ur preliminary.
hope it helps