The axis of the primitive streak is equivalent to the dorsal-ventral axis of amphibians.

TLS Online TPP Program

#Id: 2863

#Unit 13. Methods in Biology

The electronic transitions of the peptide bond occur in the far UV. The intense peak at 190 nm, and the weaker one at 210–220 nm is due to the p ® p* and n ® p* transitions.

TLS Online TPP Program

#Id: 8537

#Unit 2. Cellular Organization

Augmin-induced branches help build the spindle during mitosis.

TLS Online TPP Program

#Id: 9427

#Unit 11. Evolution and Behavior

TLS Online TPP Program

#Id: 6297

#Unit 3. Fundamental Processes

Down mutations to decrease promoter efficiency usually decrease conformance to the consensus sequences, whereas up mutations have the opposite effect.

 Mutations in the -35 sequence can affect initial binding of RNA polymerase.

Mutations in the -10 sequence can affect binding or the melting reaction that converts a closed to an open complex.

TLS Online TPP Program

#Id: 866

#Unit 13. Methods in Biology

The standard PCR does not efficiently amplify sequences much longer than about 3 kb.