Enzymes

Question 1

What are enzymes?

Answer 1

Biological catalysts that speed up the rate of reaction without being used up

Question 2

Where are fats broken down

Answer 2

Duodenum

Question 3

The process of breaking down fats

Answer 3

The enzyme lypase breaks down fats into fatty acids and glycerol

Question 4

Where are proteins digested

Answer 4

Stomach and duodenum

Question 5

The process of proteins being broken down

Answer 5

Broken down by protease into amino acids

Question 6

Where is starch broken down

Answer 6

In the mouth and duodenum

Question 7

Explain the process of starch being broken down

Answer 7

Amylase breaks down starch into maltose

Question 8

Maltose is broken down into glucose in the duodenum

Answer 8

Okay

Question 9

What is enzyme specificity

Answer 9

Each enzyme fits only one substrate and therefore there is a different enzyme for each reaction.

Question 10

Explain the process of enzymes working

Answer 10

Substrate and enzyme fit together in the active site

Substrate has now been broken down into two products or molecules

Question 11

Effect of low temperature on enzyme activity

Answer 11

At low temperatures the enzymes have low kinetic energy, therefore there are fewer collisions with the substrate and fewer enzyme substrate complexes formed.

Question 12

What happens at optimum temperature (35-40)

Answer 12

There is high kinetic energy and therefore more collisions and more enzyme substrate complexes formed. The rate of reaction increased

Question 13

What happens at high temperatures

Answer 13

At high temperatures the enzyme denatures, the active site no longer fits the substrate and the reaction cannot occur

Question 14

Which enzyme works better in acidic conditions

Answer 14

Protease

Question 15

Does increasing concentration increase the rate

Answer 15

No because there are not enough substrates left to react with the enzymes