Carboniferous - First reptile

TLS Online TPP Program

#Id: 7686

#Unit 1. Molecules and their Interaction Relevant to Biology

                                                                        Helix-turn-Helix

Two helices are connected by a small loop or turn

These helices are stabilized by non-polar contacts between the helices

Mostly found in DNA binding proteins, directly involved in DNA binding

Generally consists of 20 amino acids

Second helix is involved in DNA binding, enters in major groove of the target site

TLS Online TPP Program

#Id: 6280

#Unit 3. Fundamental Processes

Core enzyme binds indiscriminately to any DNA. Sigma factor reduces the affinity for sequence-independent binding and confers specificity for promoters.

TLS Online TPP Program

#Id: 2589

#Unit 13. Methods in Biology

Nested PCR follows the 'drop in drop out' PCR phenomenon.

TLS Online TPP Program

#Id: 8392

#Unit 2. Cellular Organization

The CaM*-Ca2+ complex binds and activates MLC kinase, phosphorylates the myosin LC. 

TLS Online TPP Program

#Id: 8017

#Unit 10. Ecological Principles

Ecological compression

Short term evolutionary response

More number of species coexist together

Non inheritable trait

Not change habitat but reduce the food range