Digestion

Question 1

What’s an enzyme

Answer 1

Biological catalysts

Question 2

Properties of enzymes

Answer 2

• all are large proteins
• space within protein molecule called ACTIVE SITE
• each enzyme catalyses a specific reaction
• work best at a specific temp and pH called OPTIMUM

Question 3

Lock and key theory

Answer 3

• used to explain how enzymes work, CHEMICAL that fits is called SUBSTRATE and it fits into ENZYMES ACTIVE SITE, LOCK
• high temp and extremes of pH make enzymes change shape, DENATURING
• cannot work anymore because substrate cannot fit into the active site

Question 4

Enzymes in digestion

Answer 4

1) enzymes pass out of cells into digestive system
2) they come into contact with food molecules
3) catalyse the breakdown of large insoluble food molecules into smaller solvable molecules

Question 5

What are the digestive enzymes ?

Answer 5

-protease (digest proteins)
-lipase (digest lipids, {fats})
-carbohydrase (carbohydrates)
— DIGEST THESE TO PRODUCE SMALLER MOLECULES THAT CAN BE EASILT ABSORBED INTO BLOODSTREAM