Food Science Trivia
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100 free Food Science trivia questions with answers — science & nature quiz, new questions added Oct 2026.
42 free food science trivia questions with answers. This food science trivia quiz is for anyone who has ever wondered why toast tastes better than bread. It covers the chemistry of cooking (the Maillard reaction, caramelization, denaturing proteins), the biology of taste (umami, supertasters, miracle fruit, why chillies burn mammals but not birds), the science of ingredients (gluten, pectin, baking powder, rennet, yeast) and the techniques and people that turned the kitchen into a lab, from Nicolas Appert's jars and Louis Pasteur's wine to sous vide, spherification and molecular gastronomy. It works for science teachers, culinary students, pub quiz rounds or a dinner party where someone always asks 'but why does that happen?'. Difficulty ranges from easy questions about what makes bread rise to hard ones about pressures inside a popcorn kernel. Every answer is checked against Wikipedia and cited on the question, so you can see where each fact comes from.
30 of 100 questions with answers and explanations. Play the quiz
Q 01The browning reaction between amino acids and sugars that flavours seared steak is named after which chemist?
Louis Camille Maillard
Louis Camille Maillard, a French physician and chemist, first described the reaction, which races along at roughly 140 to 165 °C; that is why dry heat browns food while boiling water cannot.
Q 02When sucrose caramelizes, it breaks down into which two simple sugars?
Glucose and fructose
Heat first splits sucrose into Glucose and fructose, which then dehydrate and polymerize into the brown caramel compounds; unlike the Maillard reaction, no amino acids are needed.
Q 03Which Japanese chemist identified umami as a distinct taste in 1908 after noticing the flavour of kombu?
Kikunae Ikeda
Kikunae Ikeda isolated glutamate from kombu broth at Tokyo Imperial University and patented a way to make monosodium glutamate, launching the seasoning sold as Ajinomoto.
Q 04Umami receptors respond mainly to glutamates and which other class of compounds found in meat broths?
Nucleotides
Nucleotides such as inosinate from meat and guanylate from mushrooms amplify glutamate's umami taste, which is why dashi pairs glutamate-rich kombu with bonito flakes.
Q 05Which two wheat proteins form the elastic network we call gluten?
Gliadin and glutenin
Gliadin and glutenin are wheat's storage proteins; once flour is wetted and kneaded they bond into gluten, which makes up roughly 75 to 85 percent of bread wheat's protein.
Q 06Which everyday sauce is an emulsion of oil, egg yolk and an acid?
Mayonnaise
Mayonnaise stays stable because lecithin in the egg yolk coats the oil droplets and keeps them apart; a popular origin story traces it to Mahón in Menorca in 1756.
Q 07The word 'emulsion' comes from a Latin verb meaning what?
To milk out
The Latin verb emulgere means 'To milk out'; the word was first applied to milky liquids such as almond milk, and milk itself is fat droplets dispersed in water.
Q 08Louis Pasteur's 1860s research that gave pasteurization its name was originally aimed at preserving what?
Wine
Wine was Pasteur's target: in the 1860s he showed that briefly heating it to about 50 to 60 °C stopped it souring, and the process kills most bacteria while leaving spores intact.
Q 09Georges Pralus devised sous vide in 1974 to improve which dish?
Foie gras
Foie gras lost far less fat and kept a better texture when Pralus sealed it in plastic and cooked it slowly in a water bath at Restaurant Troisgros; sous vide is French for 'under vacuum'.
Q 10Who coined the term 'molecular and physical gastronomy' in 1988?
Nicholas Kurti and Hervé This
Nicholas Kurti and Hervé This launched the term in 1988; Kurti's 1969 Royal Institution lecture The Physicist in the Kitchen famously injected brandy into mince pies with a syringe.
Q 11Spherification uses sodium alginate together with which salt?
Calcium chloride
Calcium chloride supplies the calcium ions that cross-link alginate chains into a thin gel membrane around each drop, so a liquid centre stays sealed inside the sphere.
Q 12Which restaurant, run by Ferran and Albert Adrià, brought spherification to modernist cuisine?
elBulli
elBulli sat in Cala Montjoi near Roses on the Costa Brava; Ferran Adrià joined it as a line cook in 1984, aged 22, and the restaurant served its last meal in 2011.
Q 13Why can birds eat chilli peppers without feeling the burn?
Their TRPV1 receptor ignores capsaicin
Q 21Nixtamalization, soaking maize in limewater, helps prevent which deficiency disease?
Pellagra
Pellagra is niacin deficiency; the lime soak frees the niacin locked in maize so the body can absorb it, and it also loosens the hulls and softens the kernels for masa.
Q 22Storing bread where makes it go stale fastest?
In the refrigerator
In the refrigerator, starch recrystallises fastest at temperatures just above freezing, so chilled bread stales within about a day; freezing halts the process and room temperature slows it.
Q 23When you boil an egg, what happens to its proteins to make the white turn firm and opaque?
They denature
Their TRPV1 receptor ignores capsaicin because the bird form of the heat-sensing channel lacks the mammalian binding site; that suits the plant, since birds spread seeds intact while mammal molars grind them.
Q 14In which part of a chilli pepper is capsaicin most concentrated?
The placental tissue
The placental tissue, the pale pith that holds the seeds, carries the capsaicin-secreting glands; the seeds pick up heat only because they sit against it.
Q 15Wilbur Scoville, whose scale measures chilli heat, worked in what profession?
Pharmacist
Pharmacist Wilbur Scoville devised his dilution test while working for the drug firm Parke-Davis, thinning pepper extract in sugar water until a tasting panel could no longer detect heat.
Q 16How many trained tasters sat on the panel in Scoville's original organoleptic test?
Five
Five tasters formed the panel: Scoville diluted an alcohol extract of the pepper in sugar water until the panel could no longer sense heat, and that dilution ratio became the pepper's rating.
Q 17Pectin, the gelling agent that sets jam, takes its name from a Greek word meaning what?
Congealed
Congealed is the sense of Greek pektikos, the root of pectin; apples, quince and citrus peel are rich in it, while strawberries and cherries have little and need added pectin to set.
Q 18Which Harvard professor patented the phosphate baking powder later sold as Rumford?
Eben Norton Horsford
Eben Norton Horsford, Harvard's Rumford Professor, patented a calcium acid phosphate leavening in 1856 and co-founded the Rumford Chemical Works to sell it; Alfred Bird had sold a cream-of-tartar powder in England from 1843.
Q 19Nicolas Appert, the 'father of food science', preserved food by sealing it in what and boiling it?
Glass jars
Glass jars and bottles, corked and wired shut, were Appert's vessels; the French government paid him 12,000 francs in 1810 on condition that he publish his method.
Q 20Which civilisation was freeze-drying potatoes into chuño as early as the 13th century?
The Inca
The Inca left potatoes out on freezing Andean nights and trampled the water out by day to make chuño; the modern process took off in the Second World War to preserve blood plasma and penicillin.
They denature: heat unfolds the egg's albumin proteins, which then tangle into a solid opaque network; acid and salt can also unfold proteins, which is how ceviche 'cooks' fish without heat.
Q 24Egg white is roughly what percentage water?
90 percent
90 percent of egg white is water, with nearly all the rest protein such as ovalbumin; even so, the white holds about 56 percent of the egg's total protein.
Q 25The term 'supertaster' was coined by which experimental psychologist?
Linda Bartoshuk
Linda Bartoshuk coined the term at Yale in the 1990s for people who find the bitter compound PROP intensely strong, a trait she linked to a higher density of fungiform papillae.
Q 26Miraculin, from the West African miracle fruit, makes sour foods taste how?
Sweet
Sweet is how lemon juice tastes once miraculin binds to the tongue's sweet receptors and switches them on in acid; the protein itself is not sweet, and the effect lasts an hour or two.
Q 27At roughly what temperature does a popcorn kernel's hull finally rupture?
180 °C
180 °C is where the steam pressure inside finally bursts the hull; the kernel then expands to 20 to 50 times its volume as the superheated starch puffs into foam.
Q 28A popcorn kernel needs about what moisture content inside its hull to pop?
14 to 20 percent
A kernel at 14 to 20 percent moisture holds enough water to flash into steam and build roughly 135 psi inside before the hull gives way; drier kernels stay unpopped.
Q 29Besides its high sugar concentration, which property helps honey resist spoiling?
Its acidic pH
Its acidic pH, around 3.9, comes from gluconic acid that bee enzymes make from glucose, alongside hydrogen peroxide; few microbes grow in something that acidic with so little free water.
Q 30Which gas, also a plant hormone, is used commercially to ripen fruit?
Ethylene
Scrubbing it out of storage air delays ripening, which is how apples last all year.