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100+ Free Singapore GCE N(A)-Level Nutrition and Food Science Practice Questions
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2026 Statistics
Key Facts: Singapore GCE N(A)-Level Nutrition and Food Science Exam
SEAB / Cambridge International
Exam Body
Singapore Examinations and Assessment Board
Syllabus 6073
Subject Code
SEAB GCE N(A)-Level Syllabus Specification
Paper 1 Theory (40%) + Paper 2 Coursework (60%)
Assessment Weighting
SEAB 6073 Scheme of Assessment
100 Practice Questions
Question Count
OpenExamPrep Question Bank
Grades 1-6 (Grade 5 or better passes)
Grading Scale
Singapore GCE N(A)-Level Grading System
Secondary 4 Normal (Academic)
Target Level
Ministry of Education Singapore
Carb 4kcal/17kJ, Protein 4kcal/17kJ, Fat 9kcal/38kJ
Energy Values
SEAB NFS Formula Standards
5°C to 60°C
Danger Zone
Singapore Food Agency Hygiene Guidelines
2026
Final year of the GCE N(A)- and N(T)-Level examinations before the Singapore-Cambridge SEC replaces them in 2027.
Master SEAB GCE N(A)-Level Nutrition and Food Science (Syllabus 6073) with 100 practice questions covering macronutrients, micronutrients, energy calculations, food chemistry reactions, meal planning, food safety, and preservation.
Sample Singapore GCE N(A)-Level Nutrition and Food Science Practice Questions
Try these sample questions to test your Singapore GCE N(A)-Level Nutrition and Food Science exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Which statement best describes high biological value (HBV) proteins in human nutrition?
A.They contain all indispensable (essential) amino acids in proportions required by the human body.
B.They are protein sources derived exclusively from plant foods such as legumes and grains.
C.They are proteins that cannot be digested or absorbed easily in the human alimentary canal.
D.They contain only dispensable (non-essential) amino acids manufactured by the liver.
Explanation: High biological value (HBV) proteins supply all essential (indispensable) amino acids in optimal ratios for human growth and tissue repair. Animal products such as eggs, milk, meat, fish, and soy products (a plant exception) are classified as HBV protein sources.
2Which of the following is a primary physiological function of Vitamin C (ascorbic acid) in the body?
A.Assisting in collagen synthesis for healthy connective tissues and wound healing.
B.Promoting calcium absorption in the small intestine for bone mineralization.
C.Synthesizing rhodopsin in the retina for low-light vision.
D.Functioning as a coenzyme in the synthesis of prothrombin for blood clotting.
Explanation: Vitamin C acts as a necessary cofactor for enzymes that hydroxylate proline and lysine during collagen formation. Collagen is the structural protein essential for skin, blood vessels, cartilage, bones, and wound repair.
3What is the synergic relationship between Calcium and Vitamin D in bone maintenance?
A.Vitamin D enhances the intestinal absorption of Calcium into the bloodstream.
B.Vitamin D converts excess Calcium into water-soluble compounds excreted by the kidneys.
C.Calcium activates Vitamin D precursors in the skin upon exposure to ultraviolet light.
D.Calcium inhibits Vitamin D activity to prevent hypercalcemia in skeletal muscle.
Explanation: Vitamin D stimulates the synthesis of calcium-binding proteins in the intestinal mucosa, thereby increasing active transport and absorption of dietary calcium into the bloodstream for deposition into bone tissue.
4How does insoluble dietary fibre (such as cellulose) prevent constipation in the digestive system?
A.It absorbs water, swells, and adds bulk to stools, stimulating peristalsis along the gut.
B.It breaks down into simple sugars that lubricate the mucosal lining of the colon.
C.It neutralises stomach hydrochloric acid to accelerate gastric emptying.
D.It dissolves completely in bile to emulsify unabsorbed dietary lipids.
Explanation: Insoluble fibre retains water within the large intestine, forming soft, bulky stools that stretch the muscular walls of the bowel. This mechanical stretching triggers rhythmic muscular contractions (peristalsis) that move digestive waste efficiently through the colon.
5What is the chemical composition of a triglyceride molecule found in dietary fats and oils?
A.One glycerol molecule chemically bonded to three fatty acid molecules.
B.Three glucose molecules chemically bonded to one amino acid chain.
C.One fatty acid molecule chemically bonded to three glycerol molecules.
D.Two peptide chains bonded to a phosphate ester group.
Explanation: A triglyceride (triacylglycerol) consists of a single glycerol backbone attached via ester bonds to three fatty acid chains, which may be saturated, monounsaturated, or polyunsaturated.
6Which set of vitamins consists entirely of fat-soluble vitamins that can be stored in human adipose tissue and the liver?
A.Vitamins A, D, E, and K
B.Vitamins B1, B2, B12, and C
C.Vitamins A, C, D, and Folate
D.Vitamins B6, C, E, and K
Explanation: Vitamins A, D, E, and K are fat-soluble vitamins dissolved and transported in dietary lipids. Excess amounts are stored in adipose tissue and the liver, making excessive intake potentially toxic (hypervitaminosis).
7What dietary strategy allows vegetarians to obtain a complete essential amino acid profile from plant-based foods?
A.Combining different low biological value (LBV) foods, such as grains and pulses, in the same meal.
B.Consuming large quantities of citrus fruits alongside whole wheat bread.
C.Boiling plant protein foods at high temperatures to alter their amino acid structure.
D.Restricting plant food intake to a single legume species throughout the day.
Explanation: Protein complementation pairs plant foods with mutual limiting amino acids (e.g. cereals low in lysine but high in methionine paired with pulses rich in lysine but low in methionine), creating a complete HBV amino acid mix in the overall meal.
8How do saturated fatty acids differ structurally and physically from unsaturated fatty acids?
A.Saturated fatty acids contain only single carbon-carbon bonds and are usually solid at room temperature.
B.Saturated fatty acids contain one or more double carbon-carbon bonds and are usually liquid at room temperature.
C.Saturated fatty acids contain nitrogen atoms that lower their melting point below 0°C.
D.Saturated fatty acids are water-soluble liquids derived exclusively from marine fish oils.
Explanation: Saturated fatty acids have no double bonds between carbon atoms (saturated with hydrogen). Their straight hydrocarbon chains pack closely together, resulting in higher melting points and a solid state at room temperature (e.g., butter, lard, palm oil).
9A student suffering from constant fatigue and pale skin is diagnosed with iron-deficiency anaemia. Which beverage option best aids non-heme iron absorption when consumed during meals?
A.Fresh orange juice rich in Vitamin C
B.Strong black tea rich in tannins
C.Full-cream cow's milk rich in calcium
D.Black coffee rich in chlorogenic acids
Explanation: Vitamin C (ascorbic acid) reduces ferric iron (Fe3+) to ferrous iron (Fe2+), forming a soluble chelate that is significantly more absorbable by intestinal epithelial cells.
10Which set of clinical symptoms is characteristic of severe Vitamin C deficiency (scurvy)?
A.Bleeding gums, slow wound healing, and subcutaneous petechial haemorrhages.
B.Night blindness, dry cornea (xerophthalmia), and impaired immunity.
C.Softening of bones (rickets), skeletal deformities, and bow legs.
D.Peripheral nerve damage (beriberi), loss of appetite, and muscular atrophy.
Explanation: Scurvy results from defective collagen synthesis due to lack of Vitamin C, causing fragile blood capillaries that rupture easily (bleeding gums, petechiae) and impaired tissue repair.
About the Singapore GCE N(A)-Level Nutrition and Food Science Practice Questions
Verified exam format metadata for Singapore-Cambridge GCE Normal (Academic) Level Nutrition and Food Science is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.