Across
- 2. of the double helix structure of DNA.
- 5. they discovered the double helix of DNA.
- 9. discovered two rules that helped lead to the
- 11. chemist and X-ray crystallographer whose work was central
- 12. a sequence of DNA is left out during DNA replication.
- 15. the addition of one or more nucleotide base pairs into a DNA
Down
- 1. a mutation that exchanges one base for another.
- 3. a mutation (a genetic aberration) in which a part of a
- 4. a self-replicating material which is present in nearly all living
- 6. a compound consisting of a nucleoside linked to a phosphate
- 7. DNA.
- 8. its principal role is to act as a messenger carrying instructions
- 10. the basic physical and functional unit of heredity.
- 13. the main constituent of chromosomes.
- 14. the understanding of the molecular structures of DNA and RNA.