Module AP3: Scientific Detection

Collecting and analysing reliable scientific evidence plays a fundamental role in many important decisions made on a personal, local, national and international level.

Module AP3.3: Chromatography and electrophoresis

Electrophoresis is particularly useful for separating and identifying biological molecules, such as DNA fragments.

15. recall that electrophoresis can be used for scientific detection to include identifying DNA fragments;
16. recall that electrophoresis can be used on small biological samples;
17. recall two examples of the use of DNA profiling;
18. understand how electrophoresis separates components in a mixture (because their particles carry charges, positive particles move to the negative electrode and negative particles towards the positive electrode);
19. understand that particles separate during electrophoresis because they differ in their size and the magnitude of their charge.