Following statements are regarding to recognition of sperm by mammalian zona pellucida.

A. Sperm that have undergone the acrosome reaction bind directly to zona protein ZP2 and begin making a channel toward the oocyte.

B. Sperm with an intact acrosome bind to ZP2; they undergo the acrosome reaction on the zona pellucida and then transfer their binding to ZP3.

C. When a sperm reaches the oocyte and fuses with it, the cortical granules release proteins that digest portions of ZP2 and ZP3, making them nonfunctional and prevent polyspermy.

D. When a sperm reaches the oocyte and fuses with it, the cortical granules release proteins that digest ZP3 only, not ZP2 because ZP2 involve in the process of slow block to polyspermy.

Which of the above statements are correct?

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#Question id: 11323

#Unit 10. Ecological Principles

Upwelling zones of high biological productivity are found along the western coasts of the major continents. What causes this upwelling?

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#Question id: 19691

#Unit 13. Methods in Biology

The QT interval of an electrocardiogram (ECG) includes the  

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#Question id: 5821

#Unit 8. Inheritance Biology

An organism that exhibits a novel phenotype due to a change in genetic material is:

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#Question id: 1639

#Unit 4. Cell Communication and Cell Signaling

T-cell surface receptors for antigen partly recognize:

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#Question id: 2931

#Unit 2. Cellular Organization

Which of the following is a substrate of Cln3-Cdc28?