A biological catalyst capable of speeding up a chemical reaction is known as:
-
DNA
-
Lipid
-
Polysaccharide
-
Enzyme
D
Correct answer
Explanation
Enzymes are biological catalysts - proteins that speed up chemical reactions in living organisms without being consumed themselves. They work by lowering the activation energy needed for reactions to occur. DNA carries genetic information, lipids are fats, and polysaccharides are carbohydrates - none of these are catalysts.