3.3 Enzymes in Digestion Flashcards Preview

GCSE Biology 2.3 Enzymes > 3.3 Enzymes in Digestion > Flashcards

Flashcards in 3.3 Enzymes in Digestion Deck (24)
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1

What is digestion?

The breakdown of large insoluble molecules into smaller soluble molecules

2

How do enzymes come into contact with food?

The are passed out of the cells and reach the food in various places depending on the enzyme

3

Name a carbohydrase

Amylase

4

What type of food does amylase catalyse the digestion of?

Starch into sugars

5

Where is amylase produced?

The salivary glands, the pancreas and the small intestine

6

Where does most digestion via amylase occur?

In the mouth and some in the small intestine

7

What does protease catalyse the digestion of?

Proteins into amino acids

8

Where is protease made?

The stomach, the pancreas and the small intestine

9

Where does most digestion via protease occur?

The stomach and the small intestine

10

What does lipase catalyse the digestion of?

Lipids (fats and oils) into fatty acids and glycerol

11

Where is lipase made?

The pancreas and the small intestine

12

Where does digestion via lipase occur?

The small intestine

13

Where are digestive enzymes made?

Produced by specialised cells in glands in the digestive system and in the gut

14

Why do we do digestion?

So the small soluble molecules can be absorbed and used by cells

15

Where do most enzymes work?

Inside cells

16

Where do digestive enzymes work?

Outside of cells

17

What does the gut do?

It is a hollow muscular tube that squeezes your food and helps break it up into small pieces with a large surface area for your enzymes to work on and mixes with digestive juices so enzymes come into contact with as much food as possible

18

Where does the digestion of starch start?

Your mouth

19

Why is there no digestion in the pancreas?

The enzymes flow into your small intestine

20

Where do the digested soluble food molecules go after they leave the small intestine?

They are diffused into the blood supply where they are carried around the body and to the cells that need them

21

What are the best conditions for amylase?

37*C

22

What are the best conditions for protease?

In the stomach = acid
In the pancreas = alkaline

23

What are the best conditions for lipase?

37*C

24

What type of enzymes are used in digestion?

Catabolic (break down molecules)