50 free Food Science trivia questions with answers — science & nature quiz, new questions added Aug 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 50 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
The reaction races along at roughly 140 to 165 °C, which is why dry heat browns food and boiling never does.
Q 02When sucrose caramelizes, it breaks down into which two simple sugars?
Glucose and fructose
Unlike the Maillard reaction, caramelization needs no protein at all, just sugar and heat.
Q 03Which Japanese chemist identified umami as a distinct taste in 1908 after noticing the flavour of kombu?
Kikunae Ikeda
He went on to patent monosodium glutamate, the compound behind the taste.
Q 04Umami receptors respond mainly to glutamates and which other class of compounds found in meat broths?
Nucleotides
Researchers at the University of Miami identified umami receptors on the tongue in 2000.
Q 05Which two wheat proteins form the elastic network we call gluten?
Gliadin and glutenin
Gluten makes up 75 to 85 percent of the protein in bread wheat.
Q 06Which everyday sauce is an emulsion of oil, egg yolk and an acid?
Mayonnaise
Most origin stories trace it to Mahón in Menorca during the Seven Years' War.
Q 07The word 'emulsion' comes from a Latin verb meaning what?
To milk out
Milk itself is an emulsion of fat droplets in water.
Q 08Louis Pasteur's 1860s research that gave pasteurization its name was originally aimed at preserving what?
Wine
The process kills most bacteria but leaves most bacterial spores intact.
Q 09Georges Pralus devised sous vide in 1974 to improve which dish?
Foie gras
The name is French for 'under vacuum'; low-temperature cooking itself was described by Count Rumford in 1799.
Q 10Which two scientists coined the term 'molecular and physical gastronomy' in 1988?
Nicholas Kurti and Hervé This
Kurti had hosted a 1969 BBC show called The Physicist in the Kitchen, injecting brandy into mince pies with a syringe.
Q 11Spherification uses sodium alginate together with which salt?
Calcium chloride
Unilever documented the technique in the 1950s long before elBulli made it famous.
Q 12Which restaurant, run by Ferran and Albert Adrià, brought spherification to modernist cuisine?
elBulli
It sat on the Costa Brava at Roses; Ferran Adrià had joined it as a line cook aged 22.
Q 13Why can birds eat chilli peppers without feeling the burn?
Their TRPV1 receptor ignores capsaicin
That suits the plant: birds spread the seeds intact while mammals' molars would grind them up.
Q 21Nixtamalization, soaking maize in an alkaline lime solution, helps prevent which deficiency disease?
Pellagra
The alkali also loosens the hulls and softens the kernels for making masa.
Q 22Contrary to popular belief, storing bread where makes it go stale faster?
In the refrigerator
Staling is mostly starch molecules recrystallising, not the bread drying out.
Q 23When you boil an egg, what happens to its proteins to make the white turn firm and opaque?
They denature
Heat, acid and salt can all unfold proteins, which is how ceviche 'cooks' fish without heat.
Q 14In which part of a chilli pepper is capsaicin most concentrated?
The placental tissue
The seeds get the blame because they sit in the hottest part of the fruit.
Q 15Wilbur Scoville, whose scale measures chilli heat, worked in what profession?
Pharmacist
His original test diluted pepper extract until a panel of five tasters could no longer detect heat.
Q 16How many trained tasters sat on the panel in Scoville's original organoleptic test?
Five
Sweet peppers score 500 or less; Pepper X tops 2.6 million Scoville heat units.
Q 17Pectin, the gelling agent that sets jam, takes its name from a Greek word meaning what?
Congealed
Apples, quince and citrus are rich in it; strawberries and cherries are not, which is why they need help to set.
Q 18Which Harvard professor developed the first double-acting baking powder in the 1860s?
Eben Norton Horsford
English pharmacist Alfred Bird had made a single-acting version in 1843.
Q 19Nicolas Appert, the 'father of food science', preserved food by sealing it in what and boiling it?
Glass jars
The French government paid him 12,000 francs in 1810 on condition he publish the method.
Q 20Which civilisation was freeze-drying potatoes into chuño as early as the 13th century?
The Inca
The modern process took off in the Second World War to preserve blood plasma and penicillin.
Q 24Egg white is roughly what percentage water?
90 percent
Even so, the whites hold about 56 percent of the egg's total protein.
Q 25The term 'supertaster' was coined by which experimental psychologist?
Linda Bartoshuk
It was first identified through heightened bitterness from the compound PROP.
Q 26Miraculin, from the West African miracle fruit, makes sour foods taste how?
Sweet
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
The kernel then expands to 20 to 50 times its size as the steam puffs the starch into foam.
Q 28A popcorn kernel needs about what moisture content inside its hull to pop?
14 to 20 percent
The pressure inside reaches roughly 135 psi before the hull gives way.
Q 29Besides its high sugar concentration, which property helps honey resist spoiling?
Its acidic pH
Bees add glucose oxidase to nectar, producing gluconic acid and hydrogen peroxide; despite the legend, no edible honey has actually been found in Egyptian tombs.
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.