Please answer these 3 questions Question3 1 pts The figures show the experimenta
ID: 281403 • Letter: P
Question
Please answer these 3 questions
Question3 1 pts The figures show the experimental procedure and results of an investigation. The phospholipids of the cell membrane of a single cell were chemically reacted with a small fluorescent molecule so that there was uniform labeling of the fluorescent molecule across the membrane (FRAP). The labeled cell was placed under a fluorescent microscope and observed as light from a laser was directed at a small region of the cell for a microsecond. The light bleached (damaged) the fluorescent molecules in that region so that the molecules were no longer able to fluoresce. In the time period following the bleaching event, recovery of fluorescence in the bleached region was observed and graphed. These results support which statement about cell membranes? Label phosphoipids wrh tucrescent markar leach wth aser beam Bonchod eroa ucovery ianch Tim Some membranes have more proteins than others, and some are lipid-rich. The cell membrane is composed of a lipid bilayer embedded with proteins. Phospholipids are oriented in membranes with hydrophobic tails in and hydrophilic o heads out. Membrane phospholipids interact noncovalently and are in constant flux. Some molecules are transported via simple diffusion through the phospholipid bilayer.Explanation / Answer
3. (d) Membrane phospholipids interact noncovalently and are in constant flux because FRAP is mainly used to determine the diffusion and organelle continuity and recovery of photobleaching as given in question indicates the flux through the membrane and it also indicates the noncovalent interaction in phospholipids because of this reason that molecules able to pass across the bilipid layer.
4. (c). Membrane fluidity increases in the shift from condition1 to condition 2 because the increase of unsaturation lead to the rigid fatty structure so that fatty acid chain is no more is highly condensed packed. As a result, of that in condition 2 membrane is more fluid than cond.1 membrane.
5.(b). information storage is not the function of the membrane , because its the function of the nucleic acid mostly the DNA