Biology

Biology, 10.09.2019 18:30, exiZT7535

Which statement is true about extracted lipid?
(a) the extracted lipids covered half the surface area of the intact red blood cells.
(b) the extracted lipids covered twice the surface area of the intact red blood cells.
(c) when pushed together, the extracted lipids dissolved in water.
(d) the extracted lipids covered the same surface area as the intact red blood cells.

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Biology, 29.06.2019 18:20, chimwim7515

)you treat some cells with a proteolytic enzyme that is too large to penetrate the cell membrane (set 1). another group of cells is made permeable before treatment with the enzyme (set 2). a third set of cells was not treated with the enzyme at all (controls). proteins are then extracted from the three different sets of cells and applied to an sds-page gel. protein w migrates to the same distance on a gel of proteins from set 1 and set 2; protein w migrates a shorter distance on gels of proteins extracted from the control group than on gels of proteins extracted from set 1 and set 2 treated cells. protein x migrates to the same distance on a gel of proteins from control cells and the gels of the proteins from set 1 and set 2. protein y migrates a longer distance when extracted from set 1 cells than does protein y in the controls; protein y moves an even larger distance in the gel of the extracts from set 2. protein z migrates the same distance on gels of proteins from the controls and the proteins extracted from set 1, but it migrates a longer distance in extracts from set 2 cells. which protein is exposed only on the exterior of the cell?

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Biology, 01.08.2019 12:00, sheyenne143

Gorter and grendel extracted lipids from human red blood cells. they calculated the total surface area for these red blood cells and found it to be 36 µ2. how much surface area would these lipids cover once they were spread across the surface of water?

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Biology, 30.09.2019 19:30, jenn8055

Gorter and grendel's classic conclusion that the plasma membrane of the human erythrocyte consists of a lipid bilayer was based on the following observations: (i) the lipids that they extracted with acetone from 4.74×109 erythrocytes formed a monolayer 0.89 m2 in area when spread out on a water surface; (ii) the surface area of one erythrocyte was about 100 μm2, according to their measurements.show from these data how they came to the conclusion that the erythrocyte membrane is a bilayer.1) according to the given data, the number of erythrocytes should be 0.89×1012⋅100×10−4=8.9×109. this is almost twice the number of erythrocytes as gorter and grendel estimated it, leading to the conclusion that the surface of each cell was covered with three layers of lipid.2) according to the given data, the surface area of all erythrocytes is 4.74×109/100×108m2=0.47m2. this is almost a half of the surface area formed by a monolayer as gorter and grendel estimated it, leading to the conclusion that the surface of each cell was covered with two layers of lipid.3) according to the given data, each cell has a monolayer area of 0.89×1012/4.74×109=188μm2. this is almost twice the surface area of an erythrocyte as gorter and grendel estimated it, leading to the conclusion that the surface of each cell was covered with two layers of lipid.

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Biology, 01.10.2019 20:00, Marissa101

Which statement is true about extracted lipid? (a) the extracted lipids covered half the surface area of the intact red blood cells. (b) the extracted lipids covered twice the surface area of the intact red blood cells. (c) when pushed together, the extracted lipids dissolved in water. (d) the extracted lipids covered the same surface area as the intact red blood cells.

Answers: 2

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