Given the following compositional assessment of a cell membrane, describe from ER to cell membrane how this composition was synthesized and why it is asymmetric? Cytoplasmic face Non-cytoplasmic face PI 25 8 PC 6 22 SM 4 23

Given the following compositional assessment of a cell membrane, describe from ER to cell membrane how this composition was synthesized and why it is asymmetric? Cytoplasmic face Non-cytoplasmic face PI 25 8 PC 6 22 SM 4 23

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter3: Cell Structure And Function

Section: Chapter Questions

Problem 18CTQ: Why is it advantageous for the cell membrane to be fluid in nature?

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Question

Given the following compositional assessment of a cell membrane, describe from ER to cell membrane how this composition was synthesized and why it is asymmetric?

Cytoplasmic face Non-cytoplasmic face

PI 25 8

PC 6 22

SM 4 23

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Why is it advantageous for the cell membrane to be fluid in nature?
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DO NOT COPY THE ANSWER FROM THE SAME QUESTION. Sassa, a biology professor, wanted to demonstrate to her students the applicability of a dialyzing membrane (DM) as a model for the cell membrane by enclosing an aqueous solution in a DM bag and immersing in a beaker containing a different solution. Substances available which are permeable to the DM include 0.02 M NaCl, 0.03 M glucose, and 0.01 M glucose. The only substance available which is completely impermeable to the DM is the 0.01 M lactose. Using the substances given and materials such as a beaker, stirring rod, and string, draw ONLY ONE set-up that can be demonstrated by Ms. Sassa that will satisfy ALL of the following conditions:a. No solute will exhibit a net diffusion out of the cell.b. Glucose will exhibit a net diffusion into the cell.c. NaCl will exhibit a zero net d. No net movement of lactose from the inside to outside of the cell. Make sure to label properly the substance inside the beaker and inside the DM bag.