Food Science Trivia
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99 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 99 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
Glucose and fructose are what heat first splits sucrose into; they then lose water and link up into the brown compounds of caramel, with no amino acids involved, unlike the browning of seared meat.
Q 03Which seasoning did chemist Kikunae Ikeda patent after pinning down the savoury taste of kombu broth?
MSG
MSG, monosodium glutamate, was Ikeda's answer: in 1908 he traced the broth's taste to glutamate, named that taste umami, and within a year his seasoning was on sale 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 link up into the stretchy network that lets bread dough trap gas?
Gliadin and glutenin
Gliadin and glutenin bond into gluten once flour is wetted and kneaded: glutenin gives the dough its strength and spring, while gliadin lets it stretch.
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 09Chef Georges Pralus pioneered sous vide in a restaurant kitchen in 1974 to rescue which dish?
Foie gras
Foie gras was losing up to half its weight in cooking at Restaurant Troisgros; wrapped in plastic and cooked gently it lost about 5 percent, and Pralus became known as the father of sous vide.
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, an Oxford physicist, had argued since his 1969 talk The Physicist in the Kitchen that cooking deserved proper science.
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?
El Bulli
El Bulli, on a remote bay of the Costa Brava, was voted the world's best restaurant four years running from 2006, then closed in 2011 to become a foundation for culinary creativity.
Q 13Why can birds eat chilli peppers without feeling the burn?
Their pain receptors ignore it
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 22Where does a loaf of bread go stale fastest?
In the refrigerator
In the refrigerator, because the starch in bread recrystallises fastest at temperatures just above freezing; freezing a fresh loaf avoids the problem, and it thaws well.
Q 23When you boil an egg, what happens to its proteins to make the white turn firm and opaque?
They denature
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.
Their pain receptors ignore it: the bird version of the TRPV1 channel does not respond to capsaicin as a mammal's does, which suits the plant, since birds pass the seeds intact while mammals grind them up.
Q 14In which part of a chilli pepper is the heat compound capsaicin most concentrated?
The white pith
The white pith that holds the seeds carries the glands that make capsaicin; the seeds themselves produce none and taste hot only because they sit against it.
Q 15Wilbur Scoville, whose scale measures chilli heat, worked in what profession?
Pharmacist
Pharmacist Wilbur Scoville devised his heat test while working for the drug firm Parke-Davis, rating each pepper by how far its extract had to be diluted before tasters lost the burn.
Q 16Scoville's heat test diluted pepper extract in what until tasters felt no burn?
Sugar water
Sugar water did the diluting, and the amount needed before a panel of trained tasters lost the heat became the pepper's score; labs now measure the capsaicin directly, because palates vary so much.
Q 17Pectin takes its name from a Greek word meaning what?
Congealed
Congealed is the sense of the Greek root pektos behind pectin; apples, quinces and citrus peel are rich in it, while strawberries and cherries have little and need help to set.
Q 18Baking powder pairs baking soda with what, so that it fizzes when wet?
A dry acid
A dry acid, such as cream of tartar or the calcium acid phosphate that Harvard chemist Eben Horsford patented in 1856, reacts with the soda once water is added and gives off the gas that lifts a cake.
Q 19Nicolas Appert, the French cook who invented canning around 1810, sealed his food in what before boiling it?
Glass jars
Glass jars and bottles, corked and sealed, were Appert's vessels; France paid him 12,000 francs in 1810 to publish the method, and the tin can was patented in England that same year.
Q 20Which civilisation's soldiers marched on chuño, potatoes freeze-dried by frosty nights and sunny days?
The Inca
The Inca army carried chuño because it was light and kept well, though Andean peoples were making it long before the empire; modern freeze-drying took off in wartime, to ship blood plasma and penicillin.
Q 24Which protein makes up just over half of the protein in egg white?
Ovalbumin
Ovalbumin accounts for about 54 percent of egg-white protein; the white as a whole is roughly 90 percent water and almost free of fat, which is why it is the lean, protein-rich part of the egg.
Q 25Miraculin, 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 26What makes a kernel of popcorn pop?
Trapped water turning to steam
Trapped water turning to steam builds pressure inside the tough hull until it gives way with a pop, at about 180 °C and roughly nine times atmospheric pressure.
Q 27When popcorn pops, which part of the kernel puffs into the white fluff you eat?
The starchy centre
The starchy centre, softened to a hot gel, bursts out and sets as foam; the first bit to emerge forms a leg that pushes off the pan, which is why popcorn jumps as it cooks.
Q 28Besides its high sugar concentration, which property helps honey resist spoiling?
Its acidic pH
Its acidic pH, typically between 3 and 4.5, comes largely from gluconic acid that a bee enzyme makes from glucose, along with hydrogen peroxide; little can grow in something that sour and that dry.
Q 29Which gas, also a plant hormone, is used commercially to ripen fruit?
Ethylene
Ethylene is piped over bananas that were shipped green to ripen them on arrival; scrubbing the gas out of storage air does the opposite and holds fruit back.
Q 30Which element is at the heart of the gas that makes your eyes water when you cut an onion?
Sulfur
Sulfur: damage frees enzymes that break down the onion's sulfur-bearing amino acids, and a second enzyme reshapes the product into a volatile gas, syn-propanethial S-oxide, that drifts up into the eyes.