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Which chemical compound is responsible for the spicy taste in chilli peppers?
Capsaicin
Caffeine
Ethanol
Tannin
Capsaicin
Capsaicin (C18тАЛH27тАЛNO3тАЛ) is the active chemical component in chilli peppers responsible for the characteristic pungent and spicy sensation. It is a lipophilic alkaloid that acts as a natural defense mechanism for the plant against herbivores.
Capsaicin (C18тАЛH27тАЛNO3тАЛ) is the active chemical component in chilli peppers responsible for the characteristic pungent and spicy sensation. It is a lipophilic alkaloid that acts as a natural defense mechanism for the plant against herbivores.
Think of capsaicin as a 'molecular key' that perfectly fits into the 'lock' of your mouth's heat-sensing receptors, sending a false fire alarm to your brain even when your mouth is at room temperature.
CAPSAICIN = CAPS (Chilli) + AICIN (Active Ion Channel INteractor).
C18тАЛH27тАЛNO3тАЛ тАФ Molecular formula of Capsaicin
Capsaicin functions by binding to the vanilloid receptor subtype 1 (TRPV1) ion channels located on sensory neurons in the mouth and throat. This binding triggers an influx of calcium ions, generating an action potential that sends a 'heat' or 'burning' signal to the brain, effectively tricking the nervous system into perceiving actual thermal injury despite the absence of heat.
Capsaicin is a hydrophobic molecule, explaining why water (which is polar) is ineffective at rinsing away heat; fat or dairy is better.
The Scoville Heat Unit (SHU) scale is used to measure the concentration of capsaicin in peppers.
Birds lack the TRPV1 receptor, allowing them to eat chillies and disperse seeds without feeling the heat.
Used in topical creams for pain relief due to its ability to desensitize nerve endings after repeated exposure.
High concentrations can cause severe gastric irritation and inflammation of mucous membranes.
Culinary flavoring agent
Active ingredient in pepper sprays for self-defense
Option B (Caffeine) is a stimulant found in coffee.
Option C (Ethanol) is a type of alcohol found in alcoholic beverages.
Option D (Tannin) is a group of polyphenolic compounds providing astringency in tea and wine.
A is correct тАФ Capsaicin is the primary pungent chemical compound found in plants of the genus Capsicum.
In competitive exams, remember that capsaicin is non-polar; therefore, it dissolves in oils and fats but not in water, which is why drinking water doesn't stop the 'spicy burn'.
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