Biology 9700 · AS & A Level · Testing for biological molecules

Testing for biological molecules — practice question

Sentences (i) and (ii) have been taken from longer definitions of ecological terms. In each sentence, two or more words are missing. Complete (i) and (ii) by choosing the correct terms from the list provided.
(a(i))[3]

......................................................... is the specific site and kind of local environment occupied by ......................................................... or organism, and it is described by its physical characteristics or by the dominant ......................................................... .

(a(ii))[2]

......................................................... is the functional role or position of a species of organism within ......................................................... .

(b(i))[3]

Outline the possible reasons why a large share of the light energy that strikes plant leaves is not changed into chemical energy.

(b(ii))[2]

The PE of most crops lies between 1% and 4%. Sugar cane, an important crop for food production and for the production of biofuel, has a PE of 7% to 8%. Suggest the advantages of growing crops with high PE for food production or for biofuel production.

(b(iii))[2]

Fertilisers containing nitrate are added to improve or maintain yield of crops such as sugar cane. Name two organic compounds containing nitrogen that are made by plants and state one function of each in plant growth.

(ii)[2]

The PE of most crops is $1\%$ to $4\%$. Sugar cane, an important crop plant for food production and for the production of biofuel, has a PE of $7\%$ to $8\%$. Suggest the advantages of growing crops with high PE for food production or biofuel production.

(iii)[2]

Fertilisers containing nitrate are added to improve or maintain yield of crops such as sugar cane. Name two organic compounds containing nitrogen that are made by plants and state one function of each in plant growth.

Worked solution & mark scheme

This 16-mark question has a full step-by-step worked solution and mark scheme. One marking point: The term Habitat

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