Question 1

Why do bananas make other fruit ripen faster?

Accepted Answer

Because they release **ethylene**, a gaseous plant hormone that triggers ripening — and they release a lot of it.

Ethylene signals fruit to convert starches to sugars, soften cell walls, change colour and develop aroma. Some fruits produce it in quantity as they ripen, and because the gas diffuses freely, one fruit's ethylene accelerates its neighbours.

The useful distinction is between two groups.

**Climacteric** fruits continue to ripen after picking, driven by their own ethylene production: bananas, avocados, tomatoes, apples, pears, peaches, mangoes, plums and kiwis. These can be bought firm and ripened at home.

**Non-climacteric** fruits do not: citrus, grapes, strawberries, cherries, pineapple and watermelon. Picked underripe, they stay that way. They soften and eventually rot, but they never get sweeter — which is why a sour supermarket pineapple will not improve on the counter.

This gives two practical techniques. To ripen something faster, put it in a paper bag with a banana or apple; the bag traps the ethylene while still allowing some air exchange. A sealed plastic bag traps moisture too and encourages rot.

To slow ripening, do the opposite: separate ethylene producers from sensitive produce. Bananas stored next to apples in a fruit bowl will go over quickly, and ethylene is also what makes potatoes sprout and lettuce go brown at the edges.

Refrigeration slows ethylene production, which is why most fruit keeps longer cold — but bananas are tropical and suffer chilling injury, turning the skin black even though the flesh inside stays usable.

Commercially, bananas are shipped green and ripened deliberately in ethylene-controlled rooms on arrival.

Question 2

What is the difference between gelatine, pectin and agar?

Accepted Answer

Three setting agents from completely different sources, setting at different temperatures, with different textures — and they are not interchangeable in a recipe. Gelatine. A protein derived from

Question 3

Why does fresh pineapple stop jelly from setting?

Accepted Answer

Because pineapple contains bromelain, a group of enzymes that break down protein — and gelatine is a protein. The enzyme digests the very molecules that would otherwise form the gel network, so the

Question 4

What is fermentation and why does it preserve food?

Accepted Answer

Fermentation is the controlled conversion of sugars and starches by microorganisms — bacteria, yeasts or moulds — into acids, alcohol or gases. It preserves food because those products create

Question 5

What is the difference between jam, jelly and marmalade?

Accepted Answer

All three are fruit preserved with sugar. The difference is which part of the fruit ends up in the jar. Jam is made from crushed or chopped whole fruit cooked with sugar. It contains pulp and often

Question 6

Why does salt make sweet things taste sweeter?

Accepted Answer

Partly because sodium suppresses bitterness, and partly because salt affects how the tongue's receptors respond — the net effect is that sweetness comes forward. Two mechanisms are involved. The

Question 7

What does acid actually do in cooking?

Accepted Answer

Far more than make things taste sour. Acid performs several distinct chemical jobs, which is why a squeeze of lemon improves dishes that taste nothing of lemon. Balancing flavour. Acidity cuts

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