enzymes

Question 1

what are enzymes?

Answer 1

are proteins functioning as catalysts that speed up reactions by lowering the activation energy

Question 2

what is the active site of an enzyme?

Answer 2

the active region is the region on the enzyme where the substrate binds

Question 3

what is the lock and key model of an enzyme?

Answer 3

the shape of the active site matches the shape of its substrate molecules
- this makes the enzyme highly specific. each type of enzyme can catalyse one type of a reaction or only a few

Question 4

what is the effect of temperature on enzyme activity?

Answer 4

catalysed reaction increases as the temperature increases

Question 5

what is the effect of PH on enzyme activity?

Answer 5

each enzyme has an optimum PH range. changing the PH outside of this range will slow enzyme activity. extreme PH values can cause enzymes to denature

• increasing enzyme concentration will speed up the reaction as long as there is a substrate available to bind to