You will complete ten required practical activities if you are studying GCSE Biology and twenty-one if you are studying GCSE Combined Science. You could be asked questions about the methods, safety precautions you might take, results and conclusions of these experiments.
These questions have been written by Bitesize consultants as suggestions to the types of questions that may appear in an exam paper.
In the extraction of DNA it is essential that 90% ethanol is used. Complete a risk assessment for this activity. [3 marks]
|90% ethanol could act as an irritant||Inhalation could cause irritation of the nose/throat||Use in well-ventilated area/wear safety glasses|
|90% ethanol could act as an irritant||Ethanol could touch skin during the experiment||Use gloves when pouring ethanol|
Describe how you could use the following apparatus to extract DNA from strawberries. [6 marks]
Six of these steps correctly described and in the correct order would gain full credit.