Transepithelial transport requires a _____ cell layer.

#Question id: 28887

#Unit 4. Cell Communication and Cell Signaling

What will happen in the absence of Wnts? 

#Question id: 7267

#Unit 5. Developmental Biology

Endocrine disruptors can interfere with hormone function in many ways like, They can act as antagonists and inhibit the binding of a hormone to its receptor or block the synthesis of a hormone. which of the following example best explains the antagonistic effect of endocrine disruptors?

#Question id: 7263

#Unit 5. Developmental Biology

Following statements are regarding to the drosophila.

 A. At the completion of oogenesis, the bicoid message is anchored at the anterior end of the oocyte and the nanos message is tethered to the posterior end in translationally dormant condition.

 B. The translation inhibitors Smaug and CUP. Smaug binds to the 3’UTR of both bicoid and nanos mRNA and recruits the CUP protein that prevents the association of the message with the ribosome as well as recruiting other proteins that deadenylate the message and target it for degradation.

 C. The bicoid-Exuperantia complex is transported out of the nurse cells and into the oocyte via microtubules (Kinesin ATPase).

 D. Two other maternally provided mRNAs—caudal and hunchback are critical for patterning the anterior and posterior regions of the body plan, respectively.

 Which of the following combination is correct?

#Question id: 12223

#Unit 10. Ecological Principles

#Question id: 6966

#Unit 5. Developmental Biology

During gastrulation in the frog, the very first cells to move into the interior of the embryo through the blastopore come from the surface layer of cells in the marginal zone; they will become: