Unit 8

3. Medication used against bacterial infections
15. Binds to a promotor region allowing an enzyme to bind
16. It seperates DNA fragments by their length
20. The process where stem cells divide to produce more stem cells
22. Subjecting cells to a higher temperature then the human body
23. Same written forward as written reverse
25. Cuts the DNA strands so that the desired gene can be isolated and then inserted into a vector
27. A small double stranded DNA which forms a ring
28. A short length of single stranded DNA
29. Embryonic stem cells that can differentiate int any cell type found in an embryo
30. Enzyme that synthesises RNA complementary to a template strand of DNA

1. More than one triplet can code for an amino acid
2. A biological process in which cells gain specialised functions in the body and change from one cell type to another
4. The process of copying out DNA to form preMRNA
5. Every three bases
6. Catalyses the formation of phosphodiester bonds
7. When two molecules can combine because they have a similar structure
8. A pattern serving as a mechanical guide
9. Mature mRNA before it is spliced
10. A marker is a gene that is transferred with the desired gene to enable scientists to identify which cells have been successfully altered and now contain recombinant DNA
11. Stem cells that can divide to produce any type of body cell
12. Short sequence of single stranded DNA that is complementary to the 3’ end of DNA
13. A sequence of nucleotides that signals the start of a gene
14. Method used to amplify DNA
17. Over methylation of genes
18. The study of behaviour and environment can cause changes that affect the way
19. An element with an atomic number of 1
21. A squence of three nucleotide bases at one end of a tRNA molecules that is specific to a mRNA codon
24. Base completmentary to Adenine in RNA
26. Specialised cells that help organs detect stimuli