Enzymes

Question 1

Enzyme/ substrate molecule

Answer 1

Enzyme + substrate
Enzyme substrate complex (combined)
Enzyme + products

Substrate= molecule on which enzyme acts
Active site= part of enzyme which combines with substrate

Question 2

Factors affecting enzymes

Answer 2

Anything outside small optimum range

• temperature- causes enzymes become denatured, to expand and change shape
• pH levels
• concentration
• Co-factors and co-enzymes which catalyse reaction

Question 3

Enzyme description

Answer 3

Lock and key

Proteins which do not change shape but allow chemical reactions to take place in normal environment