In the frozen tundra of the Arctic, over 100 years may be needed to decompose 75% of the litter mass. Tree species with high lignin: nitrogen ratios were more resistant to decomposition

TLS Online TPP Program

#Id: 2624

#Unit 13. Methods in Biology

Type III restriction endonucleases are intermediate between the type I and type II enzymes; they cleave DNA in the immediate vicinity of their recognition sites.

TLS Online TPP Program

#Id: 2625

#Unit 13. Methods in Biology

Traditional method of labeling DNA is by the process of nick translation . 

TLS Online TPP Program

#Id: 2626

#Unit 13. Methods in Biology

Steps of nick translation- 

Low concentrations of DNase I are used to make occasional single-strand nicks in the double-stranded DNA that is intended as the gene probe.

DNA polymerase then fills in the nicks, using an appropriate dNTP, at the same time making a new nick to the 3′ side of the previous one.

TLS Online TPP Program

#Id: 2627

#Unit 13. Methods in Biology

Types and examples of typical enzymes used in the manipulation of nucleic acids

TLS Online TPP Program

#Id: 2628

#Unit 13. Methods in Biology

Types and examples of typical enzymes used in the manipulation of nucleic acids

TLS Online TPP Program

#Id: 2629

#Unit 13. Methods in Biology

End-labelling of a gene probe at the 5′ end with alkaline phosphatase and polynucleotide kinase.