Which enzyme is responsible for breaking down complex carbohydrates into sugars during the digestion of food?

Correct option is A

Amylase is an enzyme that helps break down starches and complex carbohydrates into simpler sugars, aiding in the digestion process.
Explanation of each option:
· (a) Amylase – Correct. Amylase is the enzyme that breaks down starches into simpler sugars, and it is found in saliva and pancreatic juices.
· (b) Lipase – Incorrect. Lipase is an enzyme that breaks down fats (lipids) into fatty acids and glycerol.
· (c) Protease – Incorrect. Protease is an enzyme that breaks down proteins into amino acids.
· (d) Nuclease – Incorrect. Nuclease is an enzyme that breaks down nucleic acids into nucleotides.