Following statements are regarding to double fertilization in angiosperms.

A. One sperm cell fuses with the egg cell to produce the zygote that will develop into the new embryonic plant.

B. The second sperm cell fuses with the usually binucleate central cell, giving rise to the

endosperm, the tissue that nourishes the developing embryo. This second event is not “true” fertilization in the sense of male and female gametes undergoing fusion.

C. The second sperm cell fuses with the usually binucleate central cell, giving rise to the

endosperm, the tissue that nourishes the developing embryo. This second event is “true” fertilization in the sense of male and female gametes undergoing fusion.

D. During fertilization in angiosperm, when the sperm cells are released, the egg undergoes a flux of Ca2+. Then, chemicals released from the egg appear to make the sperm competent for cell fusion.

Which of the following statements are true?

TLS Online TPP Program

#Question id: 31219

#Unit 4. Cell Communication and Cell Signaling

The intrinsic apoptosis pathway is mediated by an activated initiator caspase:

TLS Online TPP Program

#Question id: 31220

#Unit 4. Cell Communication and Cell Signaling

Which of the following caspase activate extrinsic apoptosis pathway?

TLS Online TPP Program

#Question id: 31221

#Unit 4. Cell Communication and Cell Signaling

NGF protect neurons from cell death by inactivation of a pro-apoptotic BH3-only protein called: 

TLS Online TPP Program

#Question id: 31222

#Unit 4. Cell Communication and Cell Signaling

Bak and Bax oligomerize and form pores and holes in the outer mitochondrial membrane. These holes allow cytochrome c to enter the cytosol, where it binds to the adapter protein called as: 

TLS Online TPP Program

#Question id: 31223

#Unit 4. Cell Communication and Cell Signaling

During the necroptosis pathway which of the following ion influx causes the cell and its organelles to swell and burst?

TLS Online TPP Program

#Question id: 31224

#Unit 4. Cell Communication and Cell Signaling

In the worm apoptotic pathway, CED-3 is similar to: