Enzymes and food tests

Question 1

Describe the role of enzymes in digestion

Answer 1

Breakdown the large food molecules

Question 2

What enzymes break down protein, and what are the break down products?

Answer 2

Protease
Amino acids

Question 3

What enzymes break down lipids, and what are the break down products?

Answer 3

Lipase
Fatty acids and glycerol

Question 4

What enzymes break down carbohydrates, and what are the break down products?

Answer 4

Carbohydrase/amylase
Glucose

Question 5

What is the lock and key hypothesis?

Answer 5

Only specific enzymes fit the active sight

Question 6

What is the effect if low and high temperatures on enzymes?

Answer 6

Cold: works slower
Hot: denatures, stops working

Question 7

Describe the test and observation for glucose

Answer 7

Test- Benedict’s solution, heat
Observation- goes orange/brick red

Question 8

Describe the test and observation for starch

Answer 8

Test- iodine solution
Observation- goes blue/black

Question 9

Describe the test and observation for protein

Answer 9

Test- biuret solution
Observation- goes lilac

Question 10

Describe the test and observation for lipids

Answer 10

Test- shake in ethanol and add water
Observation- cloudy (emulsion)