DNA fingerprinting makes use of an analytical technique that you have studied. What is the name of this technique?
Before DNA fingerprinting can be done, the DNA has to be reduced to shorter lengths of polynucleotides. How is this carried out?
Which feature of the DNA fragments allows them to move in an electric field?
Use an X on the diagram to show which lines from suspect 1 and suspect 2 do not let you tell which of them was in the house.
On the basis of this evidence, one suspect was arrested. Which suspect would you expect that to be? Explain your reasoning.
A sample of a liquid, $P$, was discovered at the scene of the crime and examined by mass spectrometry and NMR spectroscopy. In the mass spectrum, the $M$ and $M+1$ peaks have a ratio of $5.1 : 0.22$, and the $M$ peak is at $m/e = 88$. The NMR spectrum is shown. Use the data to propose a structure for $P$, explaining your answer.