Following statements are related to slow block to polyspermy in mammals.

A. A First slow block to polyspermy comes When the cortical granules fuse with the egg cell membrane, they release protein-digesting enzymes which is called as ovastacin that modify the zona pellucida proteins.

B. A second slow block to polyspermy comes from the so-called zinc spark, the release of billions of zinc ions that is induced by the entry of the first sperm, these released zinc ions are seen to bind to the egg cell membrane form a “zinc shield” that prevents further sperm entry.

C. A third slow block to polyspermy occurs at the level of the egg cell membrane and involves Juno.

Which of the following is incorrect?

TLS Online TPP Program

#Question id: 2097

#Unit 2. Cellular Organization

Free and unesterified fatty acids bind to one of a number of chaperone proteins in order to be transported in the aqueous environment of the cytosol. Which of the following facilitates this intracellular transport?

TLS Online TPP Program

#Question id: 1409

#Unit 4. Cell Communication and Cell Signaling

Which DNA repair system is affected in patients with xeroderma pigmentosum?

TLS Online TPP Program

#Question id: 2466

#Unit 2. Cellular Organization

Multinucleated cells may result from a defect in:

TLS Online TPP Program

#Question id: 26994

#Unit 10. Ecological Principles

Which of the following metapopulation has showing lowest variation & highly isolated

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#Question id: 358

#Unit 1. Molecules and their Interaction Relevant to Biology

Consider the following reaction at equilibrium: CO2 + H2O ⇔ H2CO3. What would be the effect of adding additional H2O?