ABA is transported by both the xylem and the phloem, but it is normally much more abundant in the phloem sap

TLS Online TPP Program

#Id: 7363

#Unit 5. Developmental Biology

On the right side of the embryo, activin is expressed, along with activin receptor IIa. This activates Fgf8, a protein that blocks expression of the gene for Cerberus.

TLS Online TPP Program

#Id: 888

#Unit 13. Methods in Biology

The repeat region of the Huntington disease locus (HD) in six individuals is amplified by PCR and analyzed by gel electrophoresis as shown in the following figure; the numbers to the right indicate the sizes of the PCR products in bp.

               

TLS Online TPP Program

#Id: 7997

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 10167

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 2640

#Unit 13. Methods in Biology

Run-off transcription is a means of checking the efficiency and accuracy of in vitro transcription.