31. To study the evolutionary traces, which one of the following will be very useful?
32. The free OH group of the 3' - OH end of one Okazaki fragment and the phosphate group at the 5' end of another are joined by mediation of the enzyme
33. When Nicotiana tabacum is crossed with Nicotiana sylvestris the hybrids produced possess
34. Which one of the following is a hereditary disease?
35. The phenomenon by which different organisms that are not very closely related have developed similar adaptations for life in similar habitats is known as
36. Which of the following initiates transcription of mRNA on the DNA template?
37. Mutation from a wild type allele to a mutant allele is termed
38. Consider the following statements and choose the correct answer:
In order to be a useful vector, a plasmid:
1. Must possess the genes essential for replication of DNA
2. Must carry, at least, one gene that can be used as a marker for the selection of the plasmid in the transformed cell
3. Must include, at least, one gene recognizable by its product or activity, which possesses within it a cutting site for a restriction enzyme
4. In the rep region must contain a cutting site for the restriction enzyme to be used
In order to be a useful vector, a plasmid:
1. Must possess the genes essential for replication of DNA
2. Must carry, at least, one gene that can be used as a marker for the selection of the plasmid in the transformed cell
3. Must include, at least, one gene recognizable by its product or activity, which possesses within it a cutting site for a restriction enzyme
4. In the rep region must contain a cutting site for the restriction enzyme to be used
39. Haemophilia is a genetic disorder which lead to
40. The breakage-fusion-bridge-cycle in Zea mays had been reported by
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