Fig. 1.1 is a diagram of a yeast cell in a mixture of crushed malt and water.

1. aIdentify structure B. [1]
2. bIdentify structure D. [1]
3. cDescribe how named nutrients can enter the yeast cell. [4]
4. dDescribe the role played by part C in helping nutrients to enter the yeast cell. [2]
5. eActive yeast cells produce gas bubbles in the mixture. Name the gas produced. [1]

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