Nutrition and balanced dietIB MYP Sciences: Mind map

Exam questions on Nutrition and balanced diet

1. A school canteen in Dubai is redesigning its lunch menu so that students get a range of nutrient groups. Menu items include a chicken and rice bowl, buttered toast, an orange and a bean salad.
   Explain why fibre is an important part of a balanced diet.2 marks
2. A student in Auckland is given an unknown food sample, mixed with water, and carries out three tests. With iodine solution the sample turns blue-black. After heating with Benedict's solution it stays blue. With biuret reagent it stays blue.
   Describe how the student could test the sample for protein, and the result that would show protein is present.2 marks
3. On long sea voyages in the 18th century, many sailors developed bleeding gums, extreme tiredness and wounds that would not heal. Their diet was mostly dried biscuits and salted meat. When ships began to carry limes, the sailors recovered and the symptoms disappeared.
   Identify the deficiency disease the sailors had and explain why eating limes cured it.3 marks