# biology osmosis question Watch

1. hi, i have a question regarding biology
say you do an experiment like stated in a book, and say you weigh a plant sample, put it into a sucrose solution, and weigh it after to measure the change in weight
what if that plant cell BECAME plasmolysed,
so the cells in the plant lost WATER , so the cell membrane MOVED OUT.
and it became PLASMOLYSED
what would you have between the cell wall and membrane?
what would/ how would this affect your results
tyvm, looking foward to replies

PS ALSO : how would you represent this all on a graph? what would you use to represent the differnet things?
how do you represent perentage change in mass on a LINE graph?
tyvm!
2. (Original post by sixthformer)
hi, i have a question regarding biology
say you do an experiment like stated in a book, and say you weigh a plant sample, put it into a sucrose solution, and weigh it after to measure the change in weight
what if that plant cell BECAME plasmolysed,
so the cells in the plant lost WATER , so the cell membrane MOVED OUT.
and it became PLASMOLYSED
what would you have between the cell wall and membrane?
what would/ how would this affect your results
tyvm, looking foward to replies

PS ALSO : how would you represent this all on a graph? what would you use to represent the differnet things?
how do you represent perentage change in mass on a LINE graph?
tyvm!
I could help if only you could explain the question much more clearly
3. (Original post by jonathan3909)
I could help if only you could explain the question much more clearly
Say you had 5 plant strips of equal mas
and you put them into FIVE different sucrose concentrated solutions
and measured the change in mass before, and after.

percentage change in mass of 0.00 mol dm^3 = 10%
the next conc = 7%
then 0%
then -2%
then -3%

how would you plot the results
on a graph?
could you draw me one ?
ty
4. (Original post by sixthformer)
Say you had 5 plant strips of equal mas
and you put them into FIVE different sucrose concentrated solutions
and measured the change in mass before, and after.

percentage change in mass of 0.00 mol dm^3 = 10%
the next conc = 7%
then 0%
then -2%
then -3%

how would you plot the results
on a graph?
could you draw me one ?
ty
I don't really understand either.
But if the question is what kind of graph to plot the data on.. I'd suggest a bar chart..
EDIT: with the concentration as your x-axis and the mass of plant as your y. the negitive values would be plotted below the x-axis.
sorry I didn't read it properly first time
5. (Original post by sixthformer)
Say you had 5 plant strips of equal mas
and you put them into FIVE different sucrose concentrated solutions
and measured the change in mass before, and after.

percentage change in mass of 0.00 mol dm^3 = 10%
the next conc = 7%
then 0%
then -2%
then -3%

how would you plot the results
on a graph?
could you draw me one ?
ty
What I would do,

The concentration of sucrose is your independent variable, so this usually goes on the X axis. Then (obviously by elimination!) put the % change in mass as your Y axis title. I would plot it as a scatter graph (as percentage change is continuous data... bar graphs are usually used for categoric data) And if is there is a trend, draw a free-hand curve (don't join each point with a ruler! and that relationship doesn't seem linear so I wouldn't use a straight line either.
6. (Original post by sixthformer)
hi, i have a question regarding biology
say you do an experiment like stated in a book, and say you weigh a plant sample, put it into a sucrose solution, and weigh it after to measure the change in weight
what if that plant cell BECAME plasmolysed,
so the cells in the plant lost WATER , so the cell membrane MOVED OUT.
and it became PLASMOLYSED
what would you have between the cell wall and membrane?
what would/ how would this affect your results
tyvm, looking foward to replies

PS ALSO : how would you represent this all on a graph? what would you use to represent the differnet things?
how do you represent perentage change in mass on a LINE graph?
tyvm!
I wish I understood your question.......

But when a plant cell is plasmolysed you have the external solution between the cell wall and the protoplast....so in your case it will be the sucrose solution.
7. (Original post by Daniel-Ballingall)
I don't really understand either.
But if the question is what kind of graph to plot the data on.. I'd suggest a bar chart..
EDIT: with the concentration as your x-axis and the mass of plant as your y. the negitive values would be plotted below the x-axis.
sorry I didn't read it properly first time
would you draw a line or curve, and when do you know when to do what?ty
8. (Original post by butterflyeffect1)
What I would do,

The concentration of sucrose is your independent variable, so this usually goes on the X axis. Then (obviously by elimination!) put the % change in mass as your Y axis title. I would plot it as a scatter graph (as percentage change is continuous data... bar graphs are usually used for categoric data) And if is there is a trend, draw a free-hand curve (don't join each point with a ruler! and that relationship doesn't seem linear so I wouldn't use a straight line either.
say you had two y axises, above is positive change, and below is negative
and the points went downwards
how do i know wether or not to use a curve , or a line
tyvm +1
9. (Original post by sixthformer)
say you had two y axises, above is positive change, and below is negative
and the points went downwards
how do i know wether or not to use a curve , or a line
tyvm +1
Those axes sound good. There is no definite rule, judge which would represent the relationship best. Do not try to force a straight line for the sake of it if a lot of the points would be quite far from it. If the data you said earlier is what you have measured the relationship doesn't sound linear so I wouldn't use a straight line.
10. (Original post by butterflyeffect1)
Those axes sound good. There is no definite rule, judge which would represent the relationship best. Do not try to force a straight line for the sake of it if a lot of the points would be quite far from it. If the data you said earlier is what you have measured the relationship doesn't sound linear so I wouldn't use a straight line.
what you think is what my gut instinct tells me
two continuous data like this have to be curve.

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