The process keeps repeating & the final result is a gradient of osmolality from the top to the bottom of the loop

TLS Online TPP Program

#Id: 6472

#Unit 3. Fundamental Processes

RNA polymerase I requires two ancillary transcription factors to recognize the promoter sequence. The factor that binds to the core promoter is SL1 which consists of four protein subunits. SL1 has primary responsibility for RNA polymerase recruitment

TLS Online TPP Program

#Id: 6349

#Unit 8. Inheritance Biology

Dosage compensation

Equalization in males and females of the amount of protein produced by X-linked genes.

Each female cell one of the two X chromosome becomes inactive. Which X chromosome is inactivated is random.

The Xist (X inactive specific transcript) gene located on the X chromosome, in required for inactivation. 

TLS Online TPP Program

#Id: 5747

#Unit 10. Ecological Principles

The organisms which occur primarily or most abundantly in this zone are known as Edge species. Density of birds is greater in the ecotone between the forest and the desert.

TLS Online TPP Program

#Id: 6876

#Unit 3. Fundamental Processes

Most Polycomb proteins are subunits of one of two classes of multiprotein Polycomb repressive complexes: PRC1 and PRC2.

TLS Online TPP Program

#Id: 10284

#Unit 6. System Physiology – Plant

K+in channels are inhibited directly by the rise in [Ca2+]cyt. Overall, therefore, the increase in [Ca2+]cyt causes the net efflux of anions and K+ from the cell, leading to a fall in guard cell turgor.