Some people wear clothing that covers large areas of their skin. They are at risk of a dietary deficiency disease where sunlight is in short supply. Which nutrient do they lack?

Which two foods would provide the best sources of carbohydrates, calcium, fibre (roughage) and vitamin C?

Which table states the tests for different food groups?

What are the basic units from which molecules of glycogen and of protein are synthesised?

Under which set of conditions will the transpiration rate of a well-watered plant be fastest?

In the equations that follow, ☐ represents energy or an energy-rich compound. Which equation best represents aerobic …

Where are most nitrogen compounds excreted from humans?