21sophie21
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Can somebody please tell me how you would explain how substances can move in and out of cells by diffusion? And also the differences between aerobic and anaerobic respiration in yeast. Thanks
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thegodofgod
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(Original post by 21sophie21)
Can somebody please tell me how you would explain how substances can move in and out of cells by diffusion? And also the differences between aerobic and anaerobic respiration in yeast. Thanks
So what do you know so far about diffusion in and out of cells? What do substances have to cross in order to diffuse into or out of a cell? Are there substances that cannot diffuse in/out of cells? If there are any, how are they transported then?

Make a list of things that occur in aerobic respiration in yeast and make another list of things that occur during anaerobic respiration in yeast. Then compare the two lists and you'll have your differences.

Hope this helps!
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Pikachu_98
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(Original post by thegodofgod)
So what do you know so far about diffusion in and out of cells? What do substances have to cross in order to diffuse into or out of a cell? Are there substances that cannot diffuse in/out of cells? If there are any, how are they transported then?

Make a list of things that occur in aerobic respiration in yeast and make another list of things that occur during anaerobic respiration in yeast. Then compare the two lists and you'll have your differences.

Hope this helps!
Okay I don't know whether this helpful but I am doing Alevel Biology sooo.... some substance can diffuse through lipid bilayer part of membrane. the only substance that can do this is Hydrophobic molecules and extremely small hydrophilic molecules. for there molecules membrane is no barrier at all. since lipid diffusion is a passive process, no energy is involed and substance can move down their concentration gradient.
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thegodofgod
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(Original post by Pikachu_98)
Okay I don't know whether this helpful but I am doing Alevel Biology sooo.... some substance can diffuse through lipid bilayer part of membrane. the only substance that can do this is Hydrophobic molecules and extremely small hydrophilic molecules. for there molecules membrane is no barrier at all. since lipid diffusion is a passive process, no energy is involed and substance can move down their concentration gradient.
Good, that's the correct answer to your question
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Pikachu_98
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(Original post by thegodofgod)
Good, that's the correct answer to your question
My questions?
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thegodofgod
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(Original post by Pikachu_98)
My questions?
Oh, sorry - I mistook you for OP!
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Pikachu_98
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(Original post by thegodofgod)
Oh, sorry - I mistook you for OP!
Its Okay :cool:
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