Membrane Transport Practice (Overall Review) - Kate Turner | Library

Instructions

Please do not start this until we discuss it in class. This will be graded on correctness and you should work independently (not with anyone else). If you have questions please reach out to me.

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The molecule that is both hydrophobic and hydrophilic and makes up membranes is a ...

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What other biomolecule is found in the membrane of cells that helps with membrane transport?

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Which of the following requires energy to occur? Select all that apply.

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This image is illustrating ...

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Does this type of transport require energy?

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This image is illustrating ...

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Does this type of transport require energy?

Use the image below to answer the remainder of the questions.

Note: 
CO2 = small and non-polar
Salt = small and charged/polar
Starch = large and polar
Sucrose = large and polar

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The inside of the cell is _______ for carbon dioxide in comparison to the outside.

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If carbon dioxide can move through the membrane without a membrane protein, where would the carbon dioxide move?

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This type of movement is known as ...

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Would this movement require energy?

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Would all of the carbon dioxide move across the membrane?

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The outside of the cell is _____ for starch in comparison to the inside.

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If starch is too large to move across the membrane without a channel protein, but one is present in the membrane, where would the starch move?

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Would this movement require energy?

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This type of movement is known as ...

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The outside of the cell is ______ for salt in comparison to the inside.

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Assume that salt cannot move across the membrane without a membrane protein and there is no membrane protein for salt present. Where would the salt move?

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Given the previous answer, what might move across the membrane?

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Where would the molecule from the previous question move?

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What might happen to the shape of the cell given the previous answer?

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Assume the following:
- Sucrose is too large/polar to move through the membrane
- There is no protein channel for sucrose
- There are protein channels for fructose and glucose
- there is sucrase (an enzyme that breaks down sucrose) inside of the cell

What would happen?

Take a minute to think about this answer (don't rush through it) - maybe you can draw this out to help.