RNA and Protein Synthesis - A Level Biology 

Know that a gene is a sequence of bases on a DNA molecule coding for a
sequence of amino acids in a polypeptide chain.
Know the structure of mRNA including nucleotides, the sugar phosphate
backbone and the role of hydrogen bonds.
Know the structure of tRNA, including nucleotides, the role of hydrogen bonds and the anticodon.
Understand the processes of transcription in the nucleus and translation at the ribosome, including the role of sense and anti-sense DNA, mRNA, tRNA and the ribosomes.
Understand the nature of the genetic code, including triplets coding for amino acids, start and stop codons, degenerate and non-overlapping nature, and that not all the genome codes for proteins.