Biology - Enzymes - B2.5.2

HideShow resource information
  • Created by: shcoool
  • Created on: 14-05-15 22:27
What is an enzyme?
A protein that is a biological catalyst
1 of 22
What is vital for the enzyme's function?
The shape
2 of 22
What is an active site?
The part that that temporarily binds itself to the substrate.
3 of 22
How does it function?
The substrate attaches itself to the active site, which has a specific shape, and completes the reaction only at a certain temperature an dpH.
4 of 22
What happens when the temperature is too high?
The enzyme's active site changes irreversibly and it is said to be denatured. It can;t function anymore.
5 of 22
What relates enzymes to pH?
Different enzymes work best at different pHs. It will not function if the pH is far from the optimum pH
6 of 22
Where are enzymes for digestion produced?
In glands and in the lining of the gut
7 of 22
What do digestive enzymes do?
They catalyse the breakdown of large insoluble molecules into smaller soluble molecules so that they can be absorbed
8 of 22
Where is amylase produced?
salivary glands, the pancreas and the small intestine
9 of 22
What does amylase catalyse and where?
breakdown of starch into sugars in the mouth and small intestine
10 of 22
Where is protease produced?
the stomach, the pancreas and the small intestine
11 of 22
What does protease catalyse and where?
proteins into amino acids in the stomach and the small intestine
12 of 22
Which pH does protease work best at and how does it make that?
2 and the stomach produces hydrochloric acid
13 of 22
Where is lipase produced?
In the pancreas and small intestine
14 of 22
What does lipase catalyse and where?
lips (fats and oils) into fatty acids and glycerol in the small intestine
15 of 22
Where is bile produced and stored?
In the liver and stored in the gall bladder before being released into the small intestine
16 of 22
What does it do and why?
neutralises acid that was added to the food in the stomach. Provides alkaline conditions in which enzymes in the small intestine work best at
17 of 22
What else does it do?
emulsifies lipids, breaking large drops into smaller droplets, increasing the surface area for lipase to digest the lips more quickly
18 of 22
Name an enzyme that can be used in the home and its use
protease and lipase as biological detergents. More effective at lower temperatures so conserves energy and fuel.
19 of 22
Name three enzymes that can be used in industry and their uses
protease - predigest protein in baby food, carbohydrase - convert starch into sugar syrup, isomerase - glucose into fructose which is sweeter so used in smaller quantities in slimming foods
20 of 22
What can enzymes be used for in industry?
Reacts things at normal temperatures and pressures so is less expensive and environmentally friendly
21 of 22
Disadvantages of using enzymes at high temperatures?
denatured at high temperatures, costly to produce
22 of 22

Other cards in this set

Card 2


What is vital for the enzyme's function?


The shape

Card 3


What is an active site?


Preview of the front of card 3

Card 4


How does it function?


Preview of the front of card 4

Card 5


What happens when the temperature is too high?


Preview of the front of card 5
View more cards


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Enzymes and digestion resources »