A1. Within a cross-sectional study “Fit for Life” in Germany, the body mass index (BMI) of volunteers aged between 16 and 25 years was investigated. Volunteers were also interviewed about their daily exercise habits. The graphs below show the percentage of men and women who were overweight, and the percentage who exercised daily.

(a) Measure the difference between the percentage of overweight men and the percentage of overweight women at age 20.

(b) State the range of the body mass index (BMI) that corresponds to overweight status.

(c) Compare the percentage of men and women who exercised daily.

(d) Evaluate the hypothesis that being overweight is due to lack of exercise.


A2. The following nutrients are listed on a packet of dry roasted peanuts.

(a) (i) State which listed nutrient does not supply energy.

(ii) Deduce, with a reason, which listed nutrient provides the most energy per 25 g serving.

(b) Outline the differences in molecular structure between the types of fat found in the peanuts.


A3. (a) Outline the main dietary sources of energy in two different ethnic groups.

(b) Explain the benefits of supplementing common foods with vitamins and minerals.




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