2026 Cambridge IGCSE Food and Nutrition (0648) Practice Paper with Answers

(a) A balanced diet is a diet that contains all the essential nutrients (proteins, fats, carbohydrates, vitamins, minerals, water, and dietary fibre) in the correct amounts and proportions to maintain health, meet energy demands, and support growth and tissue repair.
(b) Health problems associated with overnutrition (excess intake of energy, sugars, or saturated fats) include obesity, coronary heart disease, type 2 diabetes, high blood pressure (hypertension), and dental caries.

(a) [1 mark total]: Contains all essential nutrients / correct proportions / meets bodily energy and growth needs [1]. R simply 'healthy food'.
(b) [1.5 marks total]: 0.5 mark for each distinct valid health problem up to [max 1.5]: obesity [0.5]; coronary heart disease / atherosclerosis [0.5]; type 2 diabetes [0.5]; hypertension / high blood pressure [0.5]; stroke [0.5]; dental caries [0.5]; gallstones [0.5].

(a) A severe lack of vitamin C leads to scurvy.
(b) Vitamin C is essential for collagen synthesis (healing wounds, maintaining connective tissue, blood vessel walls, and gums), acts as an antioxidant, and facilitates the absorption of iron from plant-based foods.
(c) Rich plant sources include citrus fruits (oranges, lemons, grapefruits), blackcurrants, kiwi fruit, strawberries, bell peppers, broccoli, and tomatoes.

(a) [0.5 mark]: Scurvy [0.5].
(b) [1 mark total]: 0.5 mark for each function: collagen production / healthy connective tissue / skin [0.5]; maintenance of healthy gums / capillary walls [0.5]; promotes wound healing [0.5]; aids non-haem iron absorption [0.5]; antioxidant / neutralises free radicals [0.5]. R 'gives energy'.
(c) [1 mark total]: 0.5 mark for each named plant source: oranges / lemons / limes / grapefruits [0.5]; blackcurrants / kiwi fruit / strawberries [0.5]; sweet peppers / chillies [0.5]; broccoli / Brussels sprouts / cabbage [0.5]; tomatoes [0.5]. R generic 'fruits and vegetables'.

(a) High Biological Value (HBV) proteins contain all indispensable (essential) amino acids in the correct proportions needed by the body.
(b) Soya beans (and soya products like tofu, TVP, and soya milk) and quinoa are rare plant foods that provide complete HBV protein.
(c) Protein is vital for growth of new cells, repair of damaged tissues, production of biological catalysts (enzymes), hormones, antibodies for the immune system, and as a secondary energy source.

(a) [1 mark]: Contains all essential / indispensable amino acids [1] in correct proportions needed by the body [1].
(b) [0.5 mark]: Soya beans / soya flour / tofu / TVP / tempeh / mycoprotein / quinoa [0.5]. R other beans / pulses.
(c) [1 mark total]: 0.5 mark each for any two functions: growth of body tissues / cells [0.5]; repair / maintenance of worn-out cells [0.5]; synthesis of enzymes / hormones [0.5]; antibody production / immune defence [0.5]; secondary source of energy [0.5].

(a) NSP refers to complex plant carbohydrates from cell walls that cannot be digested or broken down by human digestive enzymes.
(b) Insoluble fibre holds water, increases stool bulk, and stimulates peristaltic contractions in the intestines, preventing slow transit.
(c) Soluble fibre forms a gel in the digestive tract, slowing glucose absorption and binding bile salts to lower blood cholesterol.
(d) Diets high in NSP help prevent constipation, diverticulitis/diverticular disease, haemorrhoids (piles), and bowel/colon cancer.

(a) [0.5 mark]: Indigestible part of plant foods / structural carbohydrate of plant cell walls [0.5].
(b) [0.5 mark]: Absorbs water / adds bulk to faeces / stimulates peristalsis / speeds transit of waste [0.5].
(c) [0.5 mark]: Binds cholesterol / reduces blood cholesterol levels [0.5] OR slows glucose release / controls blood sugar levels [0.5].
(d) [1 mark total]: 0.5 mark for each condition: constipation [0.5]; diverticulosis / diverticular disease [0.5]; haemorrhoids / piles [0.5]; bowel / colon cancer [0.5]; appendicitis [0.5].

(a) Bile is synthesised and produced in the liver (and stored in the gall bladder).
(b) Bile contains bile salts that emulsify large globules of fat into tiny droplets, providing a much larger surface area for pancreatic and intestinal lipase enzymes to hydrolyse fats into glycerol and fatty acids. It also neutralises acidic chyme entering the duodenum.
(c) In the ileum, the disaccharidase enzyme maltase hydrolyses maltose into two molecules of glucose.

(a) [0.5 mark]: Liver [0.5]. R gall bladder (as it only stores bile).
(b) [1 mark total]: Emulsifies fats / breaks large fat globules into small droplets [0.5]; increases surface area for lipase action [0.5]; neutralises stomach acid / creates alkaline environment [0.5] [max 1].
(c) [1 mark total]: Enzyme: Maltase [0.5]; End-product: Glucose [0.5].

(a) Iron is an essential mineral required to make haemoglobin, the oxygen-carrying pigment found in erythrocytes (red blood cells).
(b) Inadequate intake or absorption of iron causes iron deficiency anaemia, leading to lethargy and pallor.
(c) Vitamin C (ascorbic acid) reduces ferric iron to ferrous iron, facilitating its absorption across the intestinal lining.
(d) Excellent plant-derived (non-haem) sources of iron include dark green leafy vegetables (spinach, kale), pulses (lentils, chickpeas, kidney beans), dried fruits (apricots, figs, raisins), fortified breakfast cereals, and wholemeal flour/bread.

(a) [0.5 mark]: Iron [0.5].
(b) [0.5 mark]: (Iron deficiency) Anaemia [0.5].
(c) [0.5 mark]: Vitamin C / ascorbic acid [0.5].
(d) [1 mark total]: 0.5 mark for each distinct valid plant source: spinach / kale / dark green leafy vegetables [0.5]; lentils / kidney beans / chickpeas / pulses [0.5]; dried fruit (apricots, raisins, figs) [0.5]; fortified breakfast cereals [0.5]; wholemeal bread / flour [0.5]; cocoa / plain chocolate [0.5]; nuts / seeds [0.5]. R meat / liver.

(a) A balanced diet contains all the essential nutrients (protein, carbohydrates, fats, vitamins, minerals, water, and dietary fibre) in correct proportions and sufficient amounts to supply the body's daily energy and physiological needs.
(b) Metabolism refers to all the chemical reactions occurring within living cells and tissues to sustain life, including breaking down food for energy (catabolism) and building body tissue (anabolism).
(c) Kwashiorkor is the classic protein deficiency disease; marasmus (protein-energy malnutrition) is also acceptable.

(a) Award 1 mark for each of the following points (max 2):
- Contains all the essential nutrients / correct nutrients;
- In the correct proportions / quantities / amounts;
- To maintain health / supply sufficient energy for the individual.

(b) Award 1 mark for:
- The total of all chemical reactions / processes taking place within living cells / the body (A: breaking down nutrients and building tissues).

(c) Award 1 mark for any one of:
- Kwashiorkor;
- Marasmus / protein-energy malnutrition (PEM).
[R: anaemia, rickets]

(a) NSP is essential because it absorbs water to soften the stool, provides bulk which stimulates muscular contractions (peristalsis) through the alimentary tract, and helps prevent bowel disorders such as constipation, diverticulitis, haemorrhoids, and colorectal cancer. It also assists in weight control by providing satiety.
(b) Insoluble fibre is concentrated in unrefined plant walls such as wholemeal cereal products, wheat bran, unpolished/brown rice, and skins of vegetables and fruits.

(a) Award 1 mark for each distinct valid reason (max 3):
- Absorbs water and swells to provide bulk / softens faeces;
- Stimulates peristalsis / muscular contractions of the intestine / moves waste efficiently;
- Prevents constipation;
- Reduces risk of bowel disorders / diverticular disease / haemorrhoids / colon cancer;
- Gives a feeling of fullness / satiety (helps prevent overeating / obesity);
- Soluble fibre helps lower blood cholesterol / regulates blood glucose levels.

(b) Award 1/2 mark each for any two valid sources (max 1):
- Wholemeal flour / wholemeal bread / wholewheat pasta;
- Brown rice / unpolished rice;
- Bran / wholegrain cereals (e.g. oats, barley);
- Pulses (beans, lentils, chickpeas);
- Skin of fruits and vegetables (e.g. apple skin, potato skins).
[R: white bread, refined sugar, meat/dairy]

(a) Iron is required for the production of haemoglobin, which binds and transports oxygen in the bloodstream, and myoglobin in muscles. It also acts as a cofactor in cellular energy production.
(b) Vitamin C (ascorbic acid) converts non-haem iron from the ferric ( ext{Fe}^{3+}) state to the more soluble ferrous ( ext{Fe}^{2+}) state, enhancing its uptake in the duodenum.
(c) Rich plant (non-haem) sources include dark leafy green vegetables, pulses (beans, lentils), whole grains, seeds, and dried fruits.

(a) Award 1 mark for each function (max 2):
- Formation / synthesis of haemoglobin in red blood cells;
- Transports oxygen to cells / tissues / around the body;
- Formation of myoglobin (in muscles);
- Prevents nutritional anaemia / microcytic anaemia;
- Needed for cellular respiration / energy release.

(b) Award 1 mark for:
- Vitamin C / ascorbic acid.

(c) Award 1/2 mark each for any two plant sources (max 1):
- Dark green leafy vegetables (e.g. spinach, kale, broccoli);
- Pulses / beans / lentils / chickpeas;
- Dried fruits (e.g. apricots, raisins, prunes, figs);
- Fortified breakfast cereals;
- Nuts / seeds;
- Whole grains / wholemeal flour.
[R: red meat, liver, egg yolk (plant sources required)]

(a) Bile is synthesised in the liver and concentrated/stored in the gall bladder before being released via the bile duct into the duodenum.
(b) Bile performs two critical digestive roles: it emulsifies large fat globules into minute droplets (increasing the surface area available for pancreatic lipase) and neutralises the hydrochloric acid in gastric chyme, establishing an optimum alkaline environment for intestinal and pancreatic enzymes.

(a) (i) Award 1 mark for:
- Liver.
(ii) Award 1 mark for:
- Gall bladder.

(b) Award 1 mark for each distinct function described (max 2):
- Emulsifies fats / breaks large fat globules into tiny droplets;
- Increases surface area for enzyme / pancreatic lipase action;
- Neutralises acidic chyme (from the stomach);
- Provides an alkaline environment for enzymes in the duodenum / small intestine;
- Helps in the absorption of fat-soluble vitamins (A, D, E, K).
[R: digests fats (bile is not an enzyme)]

(a) Sucrose is a disaccharide formed by the chemical condensation of one glucose molecule and one fructose molecule.
(b) The principal function of carbohydrates is to supply readily available energy ( ext{16 kJ/g} or ext{3.75 kcal/g}) for bodily functions and physical activity. They also exert a protein-sparing action and are stored as glycogen in the liver and muscles.

(a) Award 1 mark for each correct monosaccharide (max 2):
- Glucose;
- Fructose.
[R: galactose, maltose, lactose]

(b) Award 1 mark for each distinct valid function (max 2):
- Provides energy / primary source of fuel for the body / brain;
- Protein-sparing effect / spares protein from being used as an energy source;
- Stored as glycogen (in liver and muscles) for reserve energy;
- Dietary fibre (cellulose) aids peristalsis / digestion.
[R: warmth without context of energy, growth and repair]

(a) Vitamin D deficiency in growing children causes rickets, leading to soft, malformed bones (e.g. bow legs).
(b) Vitamin A is required for the production of rhodopsin in retinal rod cells (enabling vision in dim light), maintaining healthy mucous membranes, and promoting normal growth and immune defence.
(c) Retinol is obtained from animal products like liver, oily fish, and full-fat dairy products, whereas beta-carotene is supplied by orange/yellow and dark green plant foods like carrots, sweet potatoes, and spinach.

(a) Award 1 mark for:
- Rickets.
[A: osteomalacia if specified for adults, but question asks for children so award Rickets]

(b) Award 1 mark for each valid function (max 2):
- Enables vision in dim light / production of visual purple / rhodopsin (prevents night blindness);
- Keeps mucous membranes / epithelial tissue moist and healthy;
- Keeps skin healthy / maintains epidermal lining;
- Supports normal immune system function / resistance to infection;
- Required for growth and development in children;
- Acts as an antioxidant (beta-carotene).

(c) Award 1/2 mark for each source (max 1):
- Animal source (retinol): Liver, oily fish (e.g. mackerel, salmon), cod liver oil, butter, cheese, whole milk, egg yolk.
- Plant source (beta-carotene): Carrots, sweet potatoes, pumpkin, butternut squash, spinach, kale, apricots, mangoes, papayas.
[R: white bread, red meat without fat/liver]

(a) (i) Half fat to flour / 1 part fat to 2 parts flour (e.g. 100 g fat to 200 g flour / 1:2 ratio).

(ii) 1. Plain flour has a lower gluten (protein) content than strong flour, preventing excess elasticity.
2. It ensures the pastry has a crumbly, delicate, and short texture rather than being tough or chewy.

(iii) Hot water melts the fat before baking, causing the liquid fat to be absorbed directly into the flour particles instead of coating them. This prevents proper shortening, resulting in a tough, hard, greasy, and heavy finished pastry.

(b) (i) 1. Fat (butter / margarine / oil)
2. Flour (plain / all-purpose)
3. Liquid (milk / stock)

(ii) 1. At approximately 60 °C, the starch granules suspended in the liquid begin to absorb liquid and swell.
2. As heating continues to around 80 °C, the swollen starch granules burst open, releasing starch molecules (amylose/amylopectin) into the surrounding liquid.
3. The released starch forms a network, trapping liquid and causing the mixture to noticeably thicken.
4. At 100 °C (boiling point), gelatinisation is complete; upon cooking/cooling, the sauce sets into a smooth sol or gel.

(iii) Fault 1: Adding the liquid too quickly / all at once without proper blending.
Prevention 1: Remove pan from heat and add liquid gradually in small quantities, stirring/whisking thoroughly after each addition until smooth.

Fault 2: Insufficient stirring while heating the sauce over the heat source.
Prevention 2: Stir or whisk continuously throughout the heating process, ensuring the base and corners of the pan are stirred.

(c) (i) 1. Consistency / proportion: A pouring batter has a high liquid to flour ratio producing a thin, runny consistency, whereas a coating batter has a higher proportion of flour to liquid producing a thick consistency.
2. Culinary use: Pouring batter is cooked directly as the main dish (e.g. pancakes, Yorkshire puddings), whereas coating batter is used to enclose raw or cooked foods (e.g. fish, fritters) to protect food and trap steam during deep frying.

(ii) Allows the starch granules time to absorb the liquid and swell (or allows the gluten strands to relax, producing a softer, lighter texture).

(a) (i) [1 mark max]
- 1 part fat to 2 parts flour / half fat to flour / 1:2 [1]
(R incorrect ratios e.g. 1:1, 1:4)

(ii) [2 marks max, 1 mark per point]
- plain flour has lower gluten / lower protein content [1]
- strong flour would produce too much gluten / make dough too stretchy / elastic [1]
- gives a tender / short / crumbly / melt-in-the-mouth texture [1]
(R 'makes it soft' without qualification)

(iii) [2 marks max, 1 mark per point]
- melts fat prematurely / dissolves fat [1]
- fat is absorbed into flour instead of coating flour grains [1]
- results in a greasy / hard / tough / heavy pastry [1]

(b) (i) [3 marks max, 1 mark each]
- fat / butter / margarine / plant spread [1]
- flour / plain flour / wheat flour / cornflour [1]
- milk / stock / vegetable water / liquid [1]

(ii) [4 marks max, 1 mark per point]
- at 60 °C starch granules absorb liquid and swell / enlarge [1]
- at 80 °C starch granules burst open [1]
- starch / amylose is released into the liquid [1]
- liquid thickens / sauce becomes viscous [1]
- gelatinisation complete at 100 °C / boiling point / forms a sol or gel on cooling [1]

(iii) [4 marks max: 1 mark for each fault, 1 mark for corresponding prevention]
- Fault 1: liquid added too rapidly / cold liquid poured all at once [1]
- Prevention 1: add liquid gradually / in small portions off the heat and stir until smooth between each addition [1]
- Fault 2: failing to stir / stir continuously during cooking [1]
- Prevention 2: whisk / stir continuously with a wooden spoon or balloon whisk while heating [1]
- Fault 3: roux overheated / cooked at too high heat before liquid added [1]
- Prevention 3: cook roux gently over low heat without scorching [1]

(c) (i) [2 marks max, 1 mark for each valid difference]
- Consistency / ratio: pouring batter is thin / runny / higher liquid ratio whereas coating batter is thick / viscous / holds to the back of a spoon [1]
- Application / purpose: pouring batter used for pancakes / Yorkshire puddings / toad-in-the-hole, whereas coating batter is used to coat fish / vegetables / fruit fritters before frying [1]
- Protective barrier: coating batter acts as a seal against hot oil / retains moisture in food, while pouring batter cooks into a distinct structure [1]

(ii) [1 mark max]
- allows starch grains time to absorb moisture and swell [1]
- allows gluten to relax so finished product is light / not rubbery [1]
- allows air bubbles to rise and settle evenly [1]

(a) In a standard roux, fat and flour are combined in equal proportions by weight, which is a 1:1 ratio (e.g. 25 g butter to 25 g plain flour).

(b) Gelatinisation occurs in stages:
1. Around 60 °C, the insoluble starch granules begin to absorb the heated liquid (milk) and swell in size.
2. Between 80 °C and 85 °C, the swollen starch granules reach maximum capacity, rupture and burst open, releasing long chains of amylose and amylopectin into the surrounding liquid.
3. At boiling point (100 °C), the starch forms an evenly distributed viscous suspension, completing gelatinisation.

(c) Continuous agitation keeps the starch granules suspended evenly to avoid clumping (lumps) and prevents dense starch sediment from sinking to the hot bottom of the pan and burning.

(a) [1 mark total]
1:1 / equal parts / equal weights of fat and flour (e.g. 25 g fat to 25 g flour); [1]

(b) [3.5 marks total]
• (Around 60 °C) starch granules absorb liquid; [1]
• granules swell / expand in size; [0.5]
• (Around 80 °C) granules rupture / burst open / break; [1]
• starch / amylose is released into liquid; [0.5]
• (At 100 °C / boiling) liquid thickens / forms a gel / gelatinisation is complete; [0.5]
[max 3.5]

(c) [2 marks total]
1 mark per valid point:
• To prevent lumps from forming / ensures smooth consistency; [1]
• To prevent the mixture settling / sticking to the bottom of the saucepan; [1]
• To prevent burning / scorching / catching; [1]
• To distribute heat evenly throughout the mixture; [1]
[max 2]

(a) Blanching is the brief immersion of prepared vegetables in boiling water or steam for a specific time, followed immediately by rapid cooling in iced water.

(b) Blanching destroys/inactivates plant enzymes that cause spoilage, loss of colour, flavour degradation, and vitamin destruction during frozen storage. It also reduces microbial load on the vegetable surface and expels trapped air.

(c) During rapid freezing, water inside plant cells freezes very quickly, forming numerous tiny, microscopic ice crystals. These small crystals remain within the cell boundaries without piercing the cell walls. In contrast, slow freezing forms large, jagged ice crystals that puncture the cell membranes, causing cell collapse and significant drip loss (loss of juices and limp texture) upon thawing.

(a) [1 mark total]
Briefly plunging / immersing vegetables into boiling water (or steam) and then rapidly cooling / plunging in ice water; [1]

(b) [2 marks total]
1 mark per valid point:
• Inactivates / destroys enzymes (which cause spoilage / colour / flavour deterioration); [1]
• Destroys / reduces surface bacteria / microorganisms; [1]
• Retains / fixes bright colour / chlorophyll; [1]
• Helps preserve vitamin content (e.g. vitamin C); [1]
• Expels air / oxygen from vegetable tissues; [1]
• Makes vegetables easier to pack / softens slightly; [1]
[max 2]

(c) [3.5 marks total]
• Fast freezing forms small / microscopic ice crystals; [1]
• Large / jagged ice crystals form during slow freezing; [0.5]
• Small crystals do not rupture / pierce / damage plant cell walls / membranes; [1]
• Retains crisp / firm texture after thawing (R soft/soggy texture); [0.5]
• Prevents excessive drip loss / fluid loss / nutrient loss on thawing; [0.5]
[max 3.5]

(a) Key safety precautions: ensure the pan is not more than one-third full of oil to allow space for bubbling, and thoroughly dry all food items with kitchen paper before placing them into the oil to prevent spitting.

(b) Immediate treatment: hold the affected area under gentle, cold running water for a minimum of 10 to 20 minutes to dissipate heat from the skin tissues; carefully take off tight items like rings or watches before swelling occurs; cover with clean cling film or a sterile dressing; call for medical help.

(c) Never apply fatty substances (butter/oil/lotions) as they trap heat; never burst blisters as this increases infection risk; never pull away clothing that is adhering to the damaged skin.

(a) [2 marks total]
1 mark per valid point:
• Never fill the pan more than one-third / half full with oil; [1]
• Ensure food is completely dry before placing into hot oil (prevents spitting / splashing); [1]
• Never leave the pan unattended while on the heat; [1]
• Turn pan handle inward away from edge of cooker; [1]
• Do not overheat oil past its smoking point / use a cooking thermometer; [1]
• Lower food gently with a slotted spoon / basket (do not drop in); [1]
[max 2]

(b) [3 marks total]
1 mark per distinct valid step:
• Place affected area under cold running water / immerse in cold water immediately; [1]
• Cool for at least 10 to 20 minutes (until pain eases); [1]
• Remove restrictive jewellery / watches / loose clothing before swelling starts; [1]
• Cover with clean cling film / sterile non-adherent dressing / clean lint-free cloth; [1]
• Seek medical help / call an ambulance; [1]
[max 3]

(c) [1.5 marks total]
0.5 marks per valid point:
• Do not apply butter / oil / grease / ointment / lotions; [0.5]
• Do not burst / prick blisters; [0.5]
• Do not pull off / remove clothing adhering / stuck to the skin; [0.5]
• Do not use fluffy / fibrous materials (e.g. cotton wool) on the wound; [0.5]
• Do not apply ice directly to the skin; [0.5]
[max 1.5]

(a)(i) Emulsifiers contain hydrophilic and lipophilic ends, enabling immiscible liquids (such as oil and water) to mix together forming a stable emulsion (e.g., in mayonnaise or margarine).
(a)(ii) Antioxidants react with oxygen to prevent lipid oxidation (rancidity) in high-fat products and prevent enzymic discolouration in fruits and vegetables.

(b) Modified Atmosphere Packaging (MAP) is a technique where the normal ambient air inside a sealed barrier pack is removed and flushed with a tailored blend of purified gases—typically increased nitrogen and carbon dioxide with reduced oxygen—to inhibit microbial growth and biochemical decay.

(c) Advantages include:
1. Significantly extends fresh shelf-life without requiring chemical preservatives.
2. Preserves natural colour, crispness, and moisture of fresh goods.
3. Reduces logistical waste and distribution costs by allowing longer retail display times.

(a) [2 marks total]
(i) Emulsifiers: enable oil and water to mix / prevent separation of fat and water / stabilise emulsions; [1]
(ii) Antioxidants: prevent fats and oils from oxidising / turning rancid / prevent oxidative browning in foods / extend shelf-life of fatty foods; [1]

(b) [1.5 marks total]
• Changing / altering the composition of gases inside a package; [0.5]
• Replacing air / oxygen with a controlled mixture of protective gases (e.g. carbon dioxide / nitrogen / reduced oxygen); [1]

(c) [3 marks total]
1 mark per valid point:
• Extends shelf-life / keeps food fresher for longer; [1]
• Reduces the need for chemical preservatives / additives; [1]
• Retains natural colour / visual appeal (e.g. bright red colour of meat / green salad); [1]
• Slows down microbial growth / mould growth / bacterial multiplication; [1]
• Maintains crisp texture / prevents wilting of leaves / moisture loss; [1]
• Reduces transport costs / fewer deliveries needed / less food waste; [1]
[max 3]

A comprehensive essay should address two balanced sections:

1. Nutritional Importance of Eggs:
- High Biological Value (HBV) protein: contains all essential amino acids required for growth, tissue repair, and maintenance (ovalbumin in white, vitellin/livetin in yolk).
- Fat / Lipids: finely emulsified and easily digested; contains essential fatty acids, lecithin, and cholesterol, providing concentrated energy and fat-soluble nutrient delivery.
- Fat-soluble vitamins: Vitamin A (retinol) for vision in dim light, healthy skin, and immune function; Vitamin D (cholecalciferol) for calcium absorption and healthy bone/teeth development; Vitamin E (tocopherol) as an antioxidant protecting cells.
- Water-soluble B-group vitamins: Thiamin (B1), Riboflavin (B2), and Cobalamin (B12) for metabolic energy release, nervous system health, and red blood cell formation.
- Mineral elements: Non-haem iron (in the yolk) for haemoglobin synthesis and prevention of iron-deficiency anaemia; Phosphorus for energy metabolism and bone formation; trace minerals like selenium and zinc.
- Nutritional limitations: Eggs lack Vitamin C (ascorbic acid) and dietary fibre (NSP); therefore, they should be paired with vegetables, fruits, or whole grains.

2. Culinary Functions of Eggs (with named dishes):
- Coagulation / Thickening: Proteins denature and coagulate upon heating (egg white at 60 °C, yolk at 65–70 °C), setting mixtures. Examples: baked egg custard, quiche Lorraine, crème caramel.
- Binding: Coagulation traps dry ingredients together, preventing disintegration during cooking. Examples: fish cakes, meatballs, rissoles.
- Coating: Dipped in egg then coated in breadcrumbs/flour to form a protective barrier that seals in moisture and prevents fat absorption during frying. Examples: Scotch eggs, crumbed chicken goujons, croquettes.
- Aeration / Leavening: Whisking egg white traps pockets of air to form a foam; during heating, air expands and protein coagulates to set the light structure. Examples: cheese soufflé, meringues, Swiss roll / whisked sponge.
- Emulsification: Lecithin present in egg yolk acts as an emulsifier, preventing oil and water phases from separating. Examples: mayonnaise, Hollandaise sauce, creamed cake mixtures.
- Glazing: Beaten egg brushed over dough/pastry browns upon baking due to the Maillard reaction and dextrinisation, giving a glossy golden-brown crust. Examples: sausage rolls, fruit scones, meat pies.
- Clarifying: Lightly beaten egg white attracts and entraps suspended particles in cloudy stocks as it coagulates when heated. Examples: clear consommé, clear aspics.
- Garnishing / Presentation: Sliced or grated hard-boiled egg adds contrasting colour, texture, and visual interest. Examples: dressed salads, curries, open sandwiches.

Award up to [max 8 marks] for Nutritional Importance and up to [max 8 marks] for Culinary Functions with Named Dishes, to an overall maximum of 15 marks.

Nutritional Importance [max 8]:
• Protein / HBV / contains all essential amino acids; for growth / tissue repair / enzyme production;
• Fat / emulsified fat; easily digested source of concentrated energy / warmth;
• Vitamin A / retinol; for night vision / healthy mucous membranes / immune resistance;
• Vitamin D / cholecalciferol; for calcium absorption / bone and tooth calcification [R 'strengthens bones' alone];
• Vitamin E / tocopherol; antioxidant / cell membrane protection;
• Vitamin B2 / riboflavin OR B12 / cobalamin; energy metabolism / red blood cell formation / nerve function;
• Iron; formation of haemoglobin / prevention of anaemia;
• Phosphorus; energy release / works with calcium in bone structure;
• High water content / hydration (in egg white);
• Deficiency awareness: lacks vitamin C and dietary fibre / NSP [A mention that pairing with vegetables balances meals];

Culinary Functions & Named Examples [max 8]:
• Coagulation / Thickening: proteins set upon heating (white at 60°C, yolk at 65–70°C); named dish (e.g. baked egg custard / quiche / lemon curd);
• Binding: holds dry ingredients together as it coagulates; named dish (e.g. fishcakes / burgers / stuffing);
• Coating: seals exterior / prevents fat uptake and crumbling during frying; named dish (e.g. Scotch eggs / croquettes / breaded fish);
• Aeration / Raising: traps air when whisked / protein stretches and sets upon baking; named dish (e.g. soufflé / meringue / whisked sponge);
• Emulsifying: lecithin holds immiscible liquids together / prevents curdling; named dish (e.g. mayonnaise / Hollandaise / creamed cake batter);
• Glazing: produces shiny, golden-brown finish / Maillard reaction; named dish (e.g. scones / meat pies / bread rolls);
• Clarifying: traps impurities in cloudy liquid upon heating; named dish (e.g. consommé / clear soup / aspic);
• Garnishing / Enhancing appearance: adds contrasting colour and texture; named dish (e.g. salad Niçoise / curried eggs / open sandwiches).