Chapter 3.4 Catalysts and enzymes

Question 1

What is an enzyme?

Answer 1

Large protein molecules (biological catalysts). The RATE of chemical reactions are cause by enzymes

Question 2

What is vital to an enzymes function?

Answer 2

Its shape

Question 3

A catalyst SPEEDS UP/SLOWS DOWN a chemical reaction but isnt ______________in the chemical reaction.

Answer 3

speeds up

used

Question 4

What is the active sight?

Answer 4

The area where the substrate fits into the enzyme

Question 5

What is the Lock and Key theory

Answer 5

The substrate of the reaction to be catalysed fits into the active site

Question 6

What is a catalyst?

Answer 6

special chemicals that speed up reactions

Question 7

Enzymes control the metabolism.

What does this mean

Answer 7

The sum of all the reactions in the body

Question 8

Name three examples of the types of reactions that are catalysed by enzymes?

Answer 8

1 Build large molecules from small ones eg. lipids from fatty acid, protein from amino acids
2 change one molecule into another
3 breaking down large molecules into small ones eg. breaking down carbohydrates, protein and lipid into their molecules during digestion

Question 9

Enzymes can (2 things)

Answer 9

join small molecules together
AND
break up large ones