A ligand binds two different receptors with a Kd value of 10⁻⁷ M for receptor 1 and a Kd value of 10⁻⁹ M for receptor 2. For which receptor does the ligand show the greater affinity?

TLS Online TPP Program

#Question id: 18219

#Unit 1. Molecules and their Interaction Relevant to Biology

Pseudoknot loop refers to 

TLS Online TPP Program

#Question id: 18221

#Unit 9. Diversity of Life Forms

In animal cells and in the meristem cells of land plants, the nuclear envelope disintegrates during mitosis. This disintegration does not occur in the cells of most protists and fungi. According to our current knowledge of plant evolution, which group of organisms should feature mitosis most similar to that of land plants? 

TLS Online TPP Program

#Question id: 18222

#Unit 9. Diversity of Life Forms

Which event during the evolution of land plants probably made the synthesis of secondary compounds most beneficial? 

TLS Online TPP Program

#Question id: 18223

#Unit 11. Evolution and Behavior

The origin of indirect evidence of life, no recognizable fossils except bacteria (microfossils) was during which geological eras?

TLS Online TPP Program

#Question id: 18224

#Unit 11. Evolution and Behavior

Proterozoic era characterized by___

a) Origin of life

b) Fossils of blue green algae

c) Most invertebrate evolved

d) First gymnosperm

e) Abundance of marine algae

TLS Online TPP Program

#Question id: 18225

#Unit 7. System Physiology – Animal

________ refers to the long-term wear and tear on the body caused by the many simultaneous changes that need to occur to maintain homeostasis.