When a neuron responds to a particular neurotransmitter by opening gated ion channels, the neurotransmitter is serving as which part of the signal pathway?

TLS Online TPP Program

#Question id: 11414

#10. Ecological Principles

Which of the following combination of species feature that affecting a species’ sensitivity to extinction?

TLS Online TPP Program

#Question id: 19215

#12. Applied Biology

After the initial attachment step, A. tumefaciens produces a network of ________fibrils that bind the bacterium tightly to the plant cell surface. 

TLS Online TPP Program

#Question id: 23393

#Aptitude

CG, DI,?, IP, M U

TLS Online TPP Program

#Question id: 9161

#9. Diversity of Life Forms

When climbing a mountain, we can observe transitions in biological communities that are analogous to the changes ________.

TLS Online TPP Program

#Question id: 5755

#8. Inheritance Biology

A researcher studying bacterial toxin predicts that a lysine within the toxin is important for binding it’s target cell.  She used site-directed mutagenesis to change a codon for lysine (AAA) to one for asparagine (AAU).  However, the mutant toxin still binds to its target cell just as well as the wild-type toxin bound and appears to have no other changes. This type of mutation is probably