B1 3 Transport in cells foundation

Clevedon School

Science Department

Biology B1,3 – Transport in Cells Foundation

Write all answers on lined paper.

Do not write in this booklet

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Keith and Sarah carried out an investigation into the effects of osmosis on plant tissues, placing three sets of beetroot cylinders in 3 different sugar solutions for 30 minutes. One set had gained mass, another lost mass and the third set did not change. Keith student thought the last experiment hadn’t worked. Sarah disagreed. Who was right? Explain all three results in terms of osmosis. …………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………… [6]

Male moths can track down a mate from up to 3 miles away because they can detect the special chemicals produced by the female moths. The scent particles spread by diffusion. Describe the process of diffusion.

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Male moth

Female moth

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On warmer days, the scent particles diffuse more quickly than on colder days. Explain why. …………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………[2]

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Plant minerals move from the soil in to the roots of plants from a low concentration to a high concentration.

What is the name of this process? …………………………………………………………………………………………………………….. [1]

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Give one way, other than particles moving from a low concentration to a high concentration, that this process is different to diffusion. ……………………………………………………………………………………………………………… [1]

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