Uploaded January 2016 | Updated September 2026, 3 weeks ago

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7.1 DNA structure and replication & 7.2 Transcription and gene expression: Functions of DNA Base Sequences

Understanding that:

- DNA codes for proteins
-introns exist eukaryotic genes, removed to produce mature mRNA; have functions associated with mRNA processing
- telomeres are repetitive base sequences at the end of chromosomes; DNA at the ends of the chromosomes cannot be replicated, so telomeres protect genes towards the end of the chromosomes from being removed
-Genes for tRNA and rRNA; the transcription of these genes produce tRNA and mRNA