Three estrogens are present in the plasma of the human female: 

1β-estradiol

 Estrone

Estriol

TLS Online TPP Program

#Id: 3225

#Unit 4. Cell Communication and Cell Signaling

Benzo(a)pyrene, found in cigarette smoke as well as in coal tar, undergoes metabolic activation by cytochrome P-450 in the lungs to form a potent mutagen.

TLS Online TPP Program

#Id: 2874

#Unit 13. Methods in Biology

The Beer–Lambert law is valid for low concentrations only.

TLS Online TPP Program

#Id: 998

#Unit 5. Developmental Biology

The homologue of β-catenin in Drosophila is Armadillo.

TLS Online TPP Program

#Id: 9090

#Unit 4. Cell Communication and Cell Signaling

This results in continuous activation of the AC of intestinal epithelial cells, chronically active PKA which phosphorylates the CFTR Cl- channel and a Na-H exchanger in the intestinal epithelial cells. 

TLS Online TPP Program

#Id: 6733

#Unit 8. Inheritance Biology