Dental Admissions Test (DAT) Practice Test

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Prepare for the Dental Admissions Test with our comprehensive quiz! Enhance your knowledge with multiple choice questions designed to simulate the actual DAT experience, complete with hints and detailed explanations. Ace your dental school application!

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Which part of the egg do sperm cells bind to during human fertilization?

  1. Cytoplasm

  2. Eggshell

  3. Nucleus

  4. Zona Pellucida

The correct answer is: Zona Pellucida

During human fertilization, sperm cells bind to the zona pellucida, which is a glycoprotein layer surrounding the plasma membrane of the egg cell. This binding is crucial for a successful fusion between the sperm cell and the egg cell, leading to the formation of a zygote. The zona pellucida plays a key role in allowing only one sperm cell to penetrate and fertilize the egg, preventing polyspermy. Therefore, option D is the correct answer.

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