Neco 2017 Biology Question 3

Practice essay / theory question 3 from the 2017 Neco Biology examination. This question covers nutrition, dietary_requirements, human_physiology .

Neco 2017 Biology Essay / Theory

Topics: nutrition dietary_requirements human_physiology

Question 3 NECO • 2017 • BIOLOGY • essay

The diagram shows a labelled plate model of a balanced diet as recommended by the Nigerian Food Guide. The plate is divided into sections for Carbohydrates, Proteins, Fruits & Vegetables, Dairy, Oils, and a separate illustration indicating a daily water intake of 2.5 litres.

Question Parts

( a )

Identify the three major macronutrients displayed on the plate and state the primary physiological role of each in the human body.

( b )

The plate indicates that 50 % of a meal should be carbohydrate‑rich foods, 25 % protein‑rich foods and the remaining 25 % fruits & vegetables. If a person eats a 600 g meal that follows this proportion, calculate the mass (in grams) of each food group.

( c )

Explain how a deficiency of vitamin A could affect the visual system, linking your answer to the structure and function of the retina.

( d )

The diagram also shows a recommended daily water intake of 2.5 L. Discuss two physiological consequences of inadequate water intake in an adult.

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About This Question

This is Neco 2017 Biology Question 3. It is one of the essay questions from the 2017 Neco Biology examination.

The question covers nutrition, dietary_requirements, human_physiology .

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