Across
- 1. Deoxyribonucleic acid, self-replicating material that is present in all multi celled organisms
- 6. principle that bonds in DNA, can only form between adenine and thymine and between guanine and cytosine
- 10. process where one strain of bacteria is changed by a gene or genes by another strain of bacteria.
- 12. building blocks of nucleic acids
- 13. principle enzyme in DNA replication
- 14. genetic material passed from parent to child
- 15. the passing on of physical or mental characteristics genetically from one generation to another
- 18. an experiment to determine which part of a virus entered the bacterial cell.
- 19. tiny non-living particles that can infect living cells
Down
- 2. the four kinds of nitrogenous bases
- 3. copying DNA before cell division
- 4. British scientist who investigated how certain types of bacteria produced pneumonia
- 5. repetitive DNA at the end of a eukaryotic chromosome
- 7. The disease-causing bacteria that grew into smooth-edged colonies
- 8. harmless bacteria that produced colonies with rough edges
- 9. the physical structure of DNA, two linked strands that wind around each other to resemble a twisted ladder in a helix-like shape
- 11. long, slightly acidic molecules built from small monomers, or subunits called nucelotides
- 16. helps to prevent genes near the ends of chromosomes from being damaged or lost during replication
- 17. virus that infects bacteria