Parathyroid hormone stimulates calcitriol production in the kidney by increasing the synthesis of 

#Question id: 1521

#Unit 4. Cell Communication and Cell Signaling

we examine how the deregulation of growth-promoting and growth-inhibiting signaling pathways contributes to tumorigenesis. Mutations-

A. A mutation that alters a single amino acid (valine to glutamine) in the transmembrane region of the HER2 receptor

B. A deletion that causes loss of the extracellular ligand-binding domain in the EGF receptor Results-

i. dimerization of the receptor, even in the absence of the normal EGF-related ligand, transforming it into the oncoprotein, a constitutively active kinase

ii. to constitutive activation of the kinase activity of the resulting oncoprotein

iii. no dimerization, even in the presence of the normal EGF-related ligand, repression of kinase activity

which of the following results are displayed after these mutations?

#Question id: 19989

#Unit 2. Cellular Organization

#Question id: 28370

#Unit 5. Developmental Biology

the generation of dorsal/ventral axis in Drosophila, which protein signal causes follicle cells to differentiate into a dorsal axis of embryo?

#Question id: 7118

#Unit 5. Developmental Biology

At the molecular and cellular level, how does morphogenesis differ from establishment of embryonic axes and the specification of cellular identity?

#Question id: 19128

#Unit 12. Applied Biology