Enzymes

Question 1

What’s an enzyme

Answer 1

A biological catalyst made from proteins and speeds up biological reactions

Question 2

Properties of enzymes

Answer 2

1. They are temperature specific 35 -35°c
   High temperature denatures them and low temperatures deactivates them
2. PH specific
3. Never gets used up
4. Substrate specific

Question 3

Effects if temperature of enzyme activity

Answer 3

At A the enzyme is inactive due to low temperatures. AB the enzyme is inactive but as the temperatures increase the enzyme gets activated. The work rate of the enzyme increases with temperature until reaching optimum temperature at B. BC the temperature increases beyond optimum, the work rate of the enzyme decreases until the enzyme gets denatured at C

Question 4

Effects of pH on enzymes

Answer 4

Salivary amylase&raquo_space; 7
Pepsin»8
Lipase, trypsin, pancreatic amylase&raquo_space;8

Question 5

Describe digestion at the duodenum (3)

Answer 5

Pancreatic juice and bile is poured into the duodenum. Bile salts emulsifats into fat droplets. NaHCO3 contained in bile neutralizes acidic chyme from the stomach to provide a suitable environment for enzyme lipase, trypsin, pancreatic and Maltase. Enzyme then acts on the food

Question 6

Elements forming macromolecules

Answer 6

Fats»CHO
Carbohydrates&raquo_space;CHO
Protein&raquo_space;CHON