The replicase activity of DNA polymerase III was originally discovered by a conditional lethal mutation in the dnaE locus, which codes for the 130 kD, a subunit that possesses the DNA synthetic activity.

TLS Online TPP Program

#Id: 1625

#Unit 4. Cell Communication and Cell Signaling

Surfactant proteins SP-A, SP-D Block bacterial surface components; promotes phagocytosis.

TLS Online TPP Program

#Id: 2147

#Unit 9. Diversity of Life Forms

Homoplasy complicates building the phylogeny for a group of species.

TLS Online TPP Program

#Id: 382

#Unit 2. Cellular Organization

H3 and H4 histones first form heterodimers that then come together to form a tetramer with two molecules each of H3 and H4. While H2A and H2B form heterodimers in solution but not tetramers. This assembly without DNA called Histone-only Intermediates 

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#Id: 5928

#Unit 10. Ecological Principles

Ecosystem - A geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life.

TLS Online TPP Program

#Id: 10451

#Unit 4. Cell Communication and Cell Signaling

Chromosomal translocation 

That brings a growth regulatory gene under the control of alternative enhancers that cause inappropriate expression of the gene