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Capacitation refers to changes in the:

1. Ovum before fertilization
2. Ovum after fertilization
3. Sperm after fertilization
4. Sperm before fertilization

Correct answer: Sperm before fertilization

Solution

Capacitation is the series of biochemical and membrane changes sperm undergo in the female reproductive tract before they can fertilize the ovum. It increases motility and enables the acrosome reaction, so the correct choice is sperm before fertilization.

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