TLS Online TPP Program

#Id: 7436

#Unit 5. Developmental Biology

The top of the mound continues to emit cAMP pulses and is pushed upwards by the movement of cells underneath

TLS Online TPP Program

#Id: 10501

#Unit 4. Cell Communication and Cell Signaling

Engulfment involves the assembly of a halo of actin in the engulfing cell around the dying cell, triggered by activation of Rac.

TLS Online TPP Program

#Id: 4044

#Unit 2. Cellular Organization

In G-banding, chromosomes are first gently heated and then exposed to Giemsa stain; this DNA dye preferentially darkens certain regions to produce alternating dark and light G bands. Each G band is a very large segment of DNA from 1 to 10 Mb in length, containing many loops. With high-resolution G-banding techniques, a standard diploid human karyotype of 46 chromosomes is seen to contain hundreds of dark and light G bands. Not used in plants.

TLS Online TPP Program

#Id: 3286

#Unit 3. Fundamental Processes

In BER, A DNA glycosylase recognizes a damaged base (in this case, a uracil) and cleaves between the base and deoxyribose in the backbone.

TLS Online TPP Program

#Id: 5732

#Unit 10. Ecological Principles

Biotic Theory

a. Competition

b. Parasitism

c. Predation