Enzymes

Question 1

What are enzymes?

Answer 1

Biological catalyst that increases the speed of a reaction without getting used up

Question 2

What is a catalyst?

Answer 2

Substance that speeds up the rate of reaction without being used up

Question 3

what are enzymes made off?

Answer 3

Proteins that are made up of amino acids

Question 4

Why do enzymes have special shapes?

Answer 4

So they can catalyse reactions

Question 5

at what temperature do enzymes denature?

Answer 5

45 degrees

Question 6

What does optimum mean?

Answer 6

Best temperature or pH an enzyme works at

Question 7

What do proteins do?

Answer 7

They build up muscles hormones antibodies and enzymes

Question 8

Explain the enzyme reaction

Answer 8

• The enzyme has a specific shape that fits a substrate with the same unique shape,
• Where the substrate sits on the enzyme is called the active site
• The substrate and enzyme join and produce an enzyme-substrate complex
• Then the enzyme splits the substrate and makes the product

Question 9

What do enzymes need to work perfectly?

Answer 9

The right pH and temperature

Question 10

Why do enzymes need the right temperature?

Answer 10

Changing the temperature changed the rate of the enzyme-catalysed reaction
If it gets too hot the enzyme denatures and bond break
Enzymes usually work the at the optimum temperature of 37 degrees

Question 11

Why do enzymes need the right pH?

Answer 11

If pH is too low or high it interferes with the bonds holding the enzymes together this changes the shape and denatures the enzyme
Usually the optimum pH is neutral so 7, but in some like pepsin it is pH 2