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Do you add iodide when testing for starch?
yes amylose yields a blue color and amylopectin yields a purple color
Does iodine color rocks a red color?
No, iodine does not colour rocks red. However, a presence of chromium in rocks emits a red colour when exposed to yellow/green light.
Does glycogen and amylopectin have a helical structure like amylose and if yes why is it that glycogen and amylopectin form red-violet colouration with potassium iodide?
Yes, they are helical. The change in colouration is due to iodine being trapped in the helix. Difference in colour is due to the different wavelength of light being absorbed when iodine form bonds with the glucose molecules in the helix.
What color is citric acid in iodine?
It is a pinkish, red colour.
Mixing blue and red gives what colour?
purple
Why glycogen gives red colour with iodine?
When Iodine is added to amylose, the helical shape of the unbranched polysaccharide traps Iodine molecules, producing a deep blue-black complex. Amylopectin, cellulose, and Glycogen react with iodine to give red to brown colors. Glycogen produces a reddish-purple color.
Why does Iodine test gives blue color with starch but red with glycogen?
Iodine forms colour complexes with polysaccharides. The colour of the complex depends of the 3d structure of the polysaccharide. Starch is a coiled structure, which turns blue when bound to IKI (iodine solution), whereas glycogen, which is a branched molecule, turns red/brown.
What is the result of lugol's test in glycogen?
it should give dark brown color with high concentration of glyogen
Do you add iodide when testing for starch?
yes amylose yields a blue color and amylopectin yields a purple color
Does iodine color rocks a red color?
No, iodine does not colour rocks red. However, a presence of chromium in rocks emits a red colour when exposed to yellow/green light.
Does glycogen and amylopectin have a helical structure like amylose and if yes why is it that glycogen and amylopectin form red-violet colouration with potassium iodide?
Yes, they are helical. The change in colouration is due to iodine being trapped in the helix. Difference in colour is due to the different wavelength of light being absorbed when iodine form bonds with the glucose molecules in the helix.
What color is citric acid in iodine?
It is a pinkish, red colour.
Why does glycogen change to red when iodine solution is added?
Iodine tests for complex sugars. Glycogen is a complex sugar and will change dark purple when iodine solution is added (color is irrelevant, all you really need to know is that the change to a specific color signifies a presence of a macro molecule)
When iodine solution is added to cheese what colour will it become?
Red
What colour does iodine solution turn red litmus paper?
The color not change.
How are starch and glycogen similar and how do they differ?
Startch have two types of polymer chain,one is amylose and another is amylopectin.Amylose is simple straight chain of glucose(1--->4 linkage),while amylopectin have branching.At branching point,there is 1--->6 linage and 1--->4 linkage in every subchain. So,in startch 1-6 linkage comes after 20 to 25 gucose monomer,while in gycogen this linkage comes very frequently.....
What is the red pigment that gives red blood cells their colour?
Haemoglobin
