AQA Biology Essay TitleWatch
The importance of nucleotides, molecules that are derived from them and nucleic acids in keeping organisms alive
So you need about 5/6 points from various parts of the course. Draw a mind map or whatever you use to start planning your ideas. A branch could be the molecular structure of a nucleotide and how that varies between DNA and RNA. Another branch could be the DNA molecule and how the complementary base pairing of these nucleotides work, think antiparallel and 5'-3'. Maybe that could then branch into mRNA, tRNA. You could also use genetic diseases as a talking pint due to the substitution of those nitrogenous base nucleotides and frame shift that occurs. The possibilities are endless.
Make a few points, choose the strongest one you know about and let 2 years of knowledge flow through your fingertips. Good luck and go smash that essay