Biology 5090 · O Level · Photosynthesis

Photosynthesis — practice question

Grapes are fruits that develop on a plant known as a grape vine. A farmer cultivates a type of grape vine called the sultana. The grapes that are produced are sold either for eating fresh or for making dried fruit known as sultanas.
(a)[5]

In 100 g of fresh grapes made by the vine, there are 15.5 g of sugars. Describe and explain how the plant makes sugars and moves them to the fruit.

(b(i))[2]

State the meaning of the term mutation.

(b(ii))[3]

All the sultana grape plants in the farmer’s fields are genetically identical. Explain why they are all genetically identical.

(c)[3]

The farmer sprays insecticide on the grape vines to improve his crop of grapes. Explain how this affects the biodiversity in his fields.

(d(i))[2]

Give two structural similarities between grape cells and yeast cells.

(d(ii))[1]

Suggest how the yeast can grow on the skins of the grapes.

(d(iii))[2]

State two human uses of yeast.

Worked solution & mark scheme

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