OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

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What is considered a healthy BMI range for adults?

15 to 20.9
18.5 to 24.9
25 to 30
30 to 35

The correct answer is: 18.5 to 24.9

A healthy BMI (Body Mass Index) range for adults is defined as 18.5 to 24.9. This range indicates a balanced weight in relation to height, which is associated with a lower risk of developing various health issues, including heart disease, diabetes, and high blood pressure. Individuals within this BMI range are generally considered to have an ideal weight that supports overall health and well-being. BMI is calculated using the formula that divides a person's weight in kilograms by the square of their height in meters, enabling a straightforward way to assess weight status. The other ranges provided are not classified as healthy. A BMI of 15 to 20.9 indicates underweight status, which can lead to health problems such as malnutrition and decreased immune function. A BMI range of 25 to 30 is categorized as overweight, which can increase the risk of various health conditions, while a range of 30 to 35 falls into the obese category, further heightening health risks. Thus, understanding the healthy BMI range is essential for monitoring and maintaining good health.