Tiêu đề Osmosis+Exam+Questions+with+Markscheme.pdf ✅

Page 1 of 21 | WJEC/CBAC 2017 Osmosis Exam Questions with Markscheme www.alevelbiologytutor.com www.alevelbiologytutor.com
Page 2 of 21 | WJEC/CBAC 2017 The diagram below summarises a technique used to measure the water potential of beetroot cells. (a) The table shows the results of an experiment carried out by some students. 1. www.alevelbiologytutor.com www.alevelbiologytutor.com
Page 3 of 21 | WJEC/CBAC 2017 [1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (ii) Use the table below to find the water potential (ᴪcell ) of the beetroot cells. water potential (ᴪcell ) of the beetroot cells = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [1] (b) Explain why the drop of bathing solution rose in the 0.6 M solution. [4] According to these results which concentration of sucrose has the same water potential as the beetroot cells? (i) www.alevelbiologytutor.com www.alevelbiologytutor.com
Page 4 of 21 | WJEC/CBAC 2017 [2] ᴪcell = ᴪs + ᴪp The solute potential (ᴪs ) of the contents of the beetroot cells was known to be -1100kPa. Use the equation below to calculate the pressure potential (ᴪp ) of the beetroot cells when they were at equilibrium in the 0.3 M sucrose bathing solution. Show your workings. (c) www.alevelbiologytutor.com www.alevelbiologytutor.com