9700/12 Biology Feb Mar 2020 Online Test | Cambridge AS and A Level MCQ
CIE
AS & A Level
Biology (9700)
خرداد
2020
مشاهده نمونه سوال
شامل مباحث:
AS Level
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه
پیش نمایش صفحه اول فایل
Gama Admin An investigation was carried out into the effect of different treatments on the permeability of the cell surface membranes and tonoplasts of beetroot cells. Beetroot cell vacuoles contain a red pigment. This pigment is unable to pass out of the cells because it cannot diffuse through the tonoplasts or cell surface membranes.
$1c{m^3}$ cubes were cut from beetroot tissue and washed in running water for 20 minutes to remove any pigment released…
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