Input of energy in the form of ATP is required at several stages for the prepriming reaction, and it is required for unwinding DNA.

TLS Online TPP Program

#Id: 2620

#Unit 13. Methods in Biology

Some restriction endonucleases and their recognition sites.

TLS Online TPP Program

#Id: 8419

#Unit 10. Ecological Principles

The age structure of a population is the proportion of individuals that occurs in different age classes.

TLS Online TPP Program

#Id: 613

#Unit 2. Cellular Organization

trp operon can run even in the presence of repressor. The attenuation system permits another 10-fold control over the operon’s activity. 

Thus, the combination of repression and attenuation controls the operon over a 700-fold range, from fully inactive to fully active: (70-fold [repression] X 10-fold [attenuation] = 700-fold). 

TLS Online TPP Program

#Id: 4455

#Unit 13. Methods in Biology

Commonly used heavy metals

Uranyl acetate

Osmium tetraoxide 

TLS Online TPP Program

#Id: 9526

#Unit 6. System Physiology – Plant

Chewing insects, such as caterpillars, grasshoppers, and beetles, cause the most significant damage to plants.