G modification. The figure shows specific sites on guanine that are vulnerable to damage by chemical treatment, such as alkylation or oxidation, and by radiation.

TLS Online TPP Program

#Id: 8549

#Unit 1. Molecules and their Interaction Relevant to Biology

The irreversible inhibition involves reactions with a functional group, such as hydroxyl or sulphydryl, or with a metal atom in the active site or a distinct allosteric site.

TLS Online TPP Program

#Id: 6039

#Unit 10. Ecological Principles

Diversity within species 

450-700 (mycoplasma)

4000 in bacteria (eg. Escherichia coli)

13,000 in Fruit-fly (Drosophila melanogaster)

32,000 – 50,000 in rice (Oryza sativa)

35,000 to 45,000 in human beings (Homo sapiens sapiens). 

TLS Online TPP Program

#Id: 4660

#Unit 13. Methods in Biology

Normal cells treated with sodium chromate allowed to absorb and induced to death signals as T-CTLs Death of the target cells is indicated by the release of 51Cr into the supernatant

TLS Online TPP Program

#Id: 9412

#Unit 11. Evolution and Behavior

Sexual dimorphism can evolve when selection favors the expression of a trait to be different in males and females. 

This situation is called sexually antagonistic selection, because an increase in the trait’s expression benefits one sex but harms the other.

TLS Online TPP Program

#Id: 10052

#Unit 4. Cell Communication and Cell Signaling

Second cleavage of Notch occurs within membrane-spanning region & catalyzed by γ-secretase