1. Transcription occurs in a 5’ to 3’ direction. [RNA polymerase adds the 5´ end of the free RNA nucleotide to the 3´ end of the growing mRNA molecule.]

2. Nucleosomes help to regulate transcription in eukaryotes.

3. Eukaryotic cells modify mRNA after transcription.

4. Splicing of mRNA increases the number of different proteins an organism can produce.

5.Gene expression is regulated by proteins that bind to specific base sequences in DNA.

6. The environment of a cell and of an organism has an impact on gene expression.

1. The promoter as an example of non-coding DNA with a function.

1. Analysis of changes in the DNA methylation patterns.