Biology 9700 · AS & A Level · Energy

Energy — practice question

Section B Choose one question to answer.

(a)[9]

Outline the need for energy in living organisms, using named examples.

(b)[6]

Explain why carbohydrate, lipid and protein have different energy values as respiratory substrates.

Worked solution & mark scheme

This 15-mark question has a full step-by-step worked solution and mark scheme. One marking point: “ATP serves as the universal energy currency” …