Practice Questions

TLS Online TPP Program

#Question id: 1086

What is the most likely mechanism by which testosterone functions inside a cell?

#Unit 4. Cell Communication and Cell Signaling

It acts as a signal receptor that activates tyrosine kinases.
It binds with a receptor protein that enters the nucleus and activates expression of specific genes.
It acts as a steroid signal receptor that activates ion channel proteins in the plasma membrane.
It coordinates a phosphorylation cascade that reduces spermatogenesis.

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TLS Online TPP Program

#Question id: 5522

#Unit 5. Developmental Biology

In reptiles, birds, and mammals, mesoderm is made by invagination and involution into the

TLS Online TPP Program

#Question id: 5523

#Unit 5. Developmental Biology

Ectodermal cells condense into placodes that change into

TLS Online TPP Program

#Question id: 5524

#Unit 5. Developmental Biology

Interaction of the optic stalk with ectoderm makes the development of the

TLS Online TPP Program

#Question id: 5525

#Unit 5. Developmental Biology

"ontogeny recapitulates phylogeny" means

TLS Online TPP Program

#Question id: 5526

#Unit 5. Developmental Biology

The allantois

TLS Online TPP Program

#Question id: 5527

#Unit 5. Developmental Biology

Ectoderm cells related with anterior neural crest cells condense and form