Following statements are regarding to gastrulation in chick embryo.

A. During gastrulation, future mesodermal and endodermal cells migrate from the epiblast through the primitive streak into the interior of the blastoderm.

B. An aggregation of cells, known as Hensen’s node, forms at the posterior end of the streak.

C. As the streak extends, cells of the epiblast move toward the primitive streak, through it, and then outward again underneath the surface to give rise internally to the mesoderm and endoderm, the latter displacing a lower layer of cells called the endoblast.

D. Cells that remain in the epiblast form the endoderm.

Which of the following statements are correct?

TLS Online TPP Program

#Question id: 1476

#Unit 4. Cell Communication and Cell Signaling

Which of the following are killer proteins required for cell death?

TLS Online TPP Program

#Question id: 1477

#Unit 4. Cell Communication and Cell Signaling

The effector proteases in the apoptotic pathway, the caspases, are so named because

TLS Online TPP Program

#Question id: 1478

#Unit 4. Cell Communication and Cell Signaling

Caspases are different on the basis of:

TLS Online TPP Program

#Question id: 1479

#Unit 4. Cell Communication and Cell Signaling

The multi-spanning, ubiquitously expressed C. elegans plasma membrane protein CED-8 and its mammalian homolog Xkr-8 are required for-

TLS Online TPP Program

#Question id: 1480

#Unit 4. Cell Communication and Cell Signaling

In vertebrate cells, Bax or Bak is required for:

TLS Online TPP Program

#Question id: 1481

#Unit 4. Cell Communication and Cell Signaling

XIAP, one member of a family of inhibitor of apoptosis proteins (IAPs), provides another way to restrain both initiator and effector caspases. XIAP has three N-terminal BIR domains; the one termed BIR2 binds to and inhibits: