OCR GCSE Biology 2025 – 400 Free Practice Questions to Pass the Exam

The primary function of sperm cells in animals and humans is to deliver male DNA to female DNA during the process of reproduction. Sperm cells are specialized gametes that are essential in sexual reproduction. They are produced in the male reproductive system and carry genetic material from the male parent to the female egg, also known as an ovum.

During fertilization, the sperm cell penetrates the ovum, combining its genetic material with that of the female to create a zygote. This zygote will then develop into an embryo, leading to the potential formation of a new organism. The unique structure of sperm cells, which includes a flagellum for motility and enzymes in the acrosome to aid in penetrating the egg, reflects their specialized role in the reproductive process.

In contrast, providing energy for the body is a function associated with nutrients and the digestive system, while protection from infection typically involves the immune system. Transporting nutrients is a role carried out by various bodily systems, primarily the circulatory system. Thus, the primary focus of sperm cells remains firmly in the realm of reproduction and genetic contribution.