What is the chief food fact contained in cereals?

Appeared in: MNS 2015

Explanation

The term 'chief food fact' asks for the most abundant nutrient in cereals.
Cereals are plant seeds, and their primary energy reserve is stored as starch, a complex carbohydrate (polysaccharide).
Nutritional analysis shows that starch is the most common carbohydrate in the human diet, with cereals like rice, wheat, and maize being the major sources.
Sources confirm that cereals can contain between 65% and 85% starch by weight, making it the predominant component.

Option A: Glucose is a simple sugar (monosaccharide). While starch is composed of glucose units, cereals store energy as the complex polymer (starch), not as free glucose.
Option B: The term 'sugar' typically refers to simple carbohydrates like sucrose or fructose. Cereals are primarily composed of complex carbohydrates (starch), not simple sugars.
Option D: While cereals do contain protein, it is not the most abundant nutrient. The protein content (typically 6-12%) is significantly lower than the starch content.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Nutritional composition of cereals as background academic context rather than a clinical decision trigger.
Understanding that cereals are mainly starch is fundamental for patient education on nutrition, especially for managing diabetes, where carbohydrate counting is essential.
Nurses use this knowledge to advise on balanced diets, emphasizing that while cereals provide energy, they must be balanced with protein, fats, vitamins, and minerals.
This concept is also relevant to celiac disease, an autoimmune disorder triggered by gluten, a protein found in certain cereals like wheat, barley, and rye.

How to Approach the Question

First, decode the question's core ask. 'Chief food fact' points to the most abundant or primary nutrient.
Recall the basic nutritional composition of major food groups. Cereals are staple foods known for being energy-rich.
Evaluate each option based on biochemical and nutritional principles. Starch is the energy storage form in plants.
Eliminate Glucose, as it's the monomer, not the stored polymer. Eliminate 'Sugar' as it refers to simple carbs, which are not primary in cereals.
Compare Starch and Protein. Cereals are known to be carbohydrate-dense, not protein-dense. Therefore, starch is the most plentiful nutrient.
Conclude that Starch is the correct answer as it is the main component of cereals.

Concept Tested & Keywords

Q1Rhob38p6TZWtKrEtRCHI

E6 Biochemistry U Satyanarayana— Part 1 (pp 26-420 of 840) p. 7-9

E6 textbook of Applied Biochemistry and Nutrition & DieteticsHarbans Lal (pp 26-464 of 479) p. 249-251

E6 Nutrition Monika Sharma 3e p. 64-66

Practise the full MNS 2015

Attempt every question from this paper in a timed mock, then review the full solution for each one.