Treating an Oocyte with a Chemical That Binds Calcium and Magnesium

Question

Treating an oocyte with a chemical that binds calcium and magnesium ions will block ________.
A) the acrosomal reaction
B) fusion of sperm and egg nuclei
C) the fast block to polyspermy
D) formation of the fertilization envelope

Accepted Answer

Calcium ions are crucial for the formation of the fertilization envelope, which is part of the slow block to polyspermy. Binding calcium ions would prevent this process.