Question 11 -2.5 points In the online practical video, a segment of liver tissue was homogenised to create an aqueous li

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Question 11 2 5 Points In The Online Practical Video A Segment Of Liver Tissue Was Homogenised To Create An Aqueous Li 1 (160.14 KiB) Viewed 33 times

Question 11 -2.5 points In the online practical video, a segment of liver tissue was homogenised to create an aqueous liver homogenate. The liver homogenate was added to 2.5ml of trichloroacetic acid (TCA) reagent and a white precipitate formed. a. The TCA becomes insoluble when added to the liver extract b. The white precipitate should not form c. Proteins are present in the liver extract which precipitate in acid d. The TCA is denatured as a white precipitate in the liver extract Question 12-1 point In which phase (layer) did the carotene dissolve (disperse into)? a. Hexane (organic / non-polar) b. Water (aqueous/polar) Question 13 - 1 point In which phase (layer) did the olive oil dissolve (disperse into)? a. Hexane (organic / non-polar) b. Water (aqueous/polar) Question 14-1 point If a group of lipids dissolves in Hexane, what does it indicate about the physico-chemical properties of these lipids? a. Hydrophobic and non-polar b. Hydrophilic and polar Colloid Question 15 - 3.5 points C. You perform the starch test for residual iodine. The iodine allows a halogenation reaction to occur in the presence of unsaturated lipids. Listed below are the observations you made during the starch test for carotene, olive oil and hexane. Carotene + iodine = Clear solution Olive oil + iodine = Blue solution Hexane control + iodine = Dark blue solution What do the results indicate about the structures of these lipids? a. Carotene contains more double bonds that olive oil; Olive oil contains some double bonds as it was less blue that the control Hexane. b. Olive oil has more double bonds than carotene, Hexane has some double bonds and carotene has no double bonds c. Olive oil and carotene have no double bonds d. Carotene has double bonds while olive oil has no double bonds