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FreeScienceLessons · AQA BiologyDNA and the Genome
Key facts
DNA structure — fill in the table
| Term | Definition |
|---|
| DNA | |
| Nucleotide | |
| Complementary base pairs | |
| Hydrogen bonds | |
| Location | |
Genes and the genome — fill in the table
| Term | Definition |
|---|
| Gene | |
| Genome | |
| Human Genome Project | |
| Importance | |
| Protein synthesis | |
| Mutation | |
Exam questions — 3 questions · 9 marks
⚡ Extended questions included. Read the hint. Write in full sentences. AI marks against the AQA mark scheme.
1 markComplementary base pairingAQA 8461 style
A section of DNA has the sequence ATCGGA. What is the complementary base sequence on the other strand?
A ATCGGA
B TAGCCT
C UAGCCU
D TACGGT
4 marksProtein synthesis chainAQA 8461 P2 style
Describe the process by which DNA is used to synthesise a protein. (4 marks)
Hint: Two stages: transcription (DNA → mRNA in nucleus) → translation (mRNA → protein at ribosome). Mention codons and amino acids.
+40 XP
1 markGenome significanceAQA 8461 style
Why is knowledge of the human genome important for medicine?
A It allows scientists to create new genetic mutations deliberately
B It allows identification of genes associated with inherited diseases, enabling earlier diagnosis and development of targeted treatments
C It means all genetic diseases can now be cured by gene therapy
D It replaces the need for clinical trials
Quick recall flashcards
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