Correct option is A - enzyme
An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process. The biological processes that occur within all living organisms are chemical reactions, and most are regulated by enzymes.
- Lipases – a group of enzymes that help digest fats in the gut.
- Amylase – helps change starches into sugars.
- Maltase – also found in saliva; breaks the sugar maltose into glucose.
- Trypsin – found in the small intestine, breaks proteins down into amino acids.