Original practice
Mark points shown after marking
Write the word equation for aerobic respiration.
(2)+ → +
Total for this question: 2 marks
COMMAND WORD · BIOLOGY
Write
When this taxonomy says Write, produce the equation in the form that was asked for, not a paragraph.
Method
The form they asked for, then every required substance, then stop.
What the parts mean
- Formwords or symbols, as asked
- Substancesthe reactants and products, balanced if a balanced equation was asked for
- Stopno commentary unless the question also says explain
How to build your answer
- 1Check whether they want words or a symbol equation.
- 2Include every reactant and product.
- 3Balance the equation if a balanced equation was asked for.
- 4Stop.
Biology exemplar
Original question
Write the word equation for photosynthesis.
Annotated answer
FormWords, because a word equation was asked for. SubstancesCarbon dioxide + water → glucose + oxygen. StopLight can be shown as a condition. It is not written as if it were used up like a reactant.
The labels match the frame. Read them in order. This is one accurate route, not the only one.
Exam habit
If the answer contains no arrow, you have not written the equation.
Common pitfall
Writing “plants use sunlight to make food” instead of the equation.
Practice question
Answer discussion
glucose + oxygen → carbon dioxide + water. A description of mitochondria is not the equation. Energy can be noted, but the substances are the equation.