active sites and substrates - SB1

Question 1

what is the active site?

Answer 1

where the substrate fits on the part of the enzyme at the start of the reaction

Question 2

how does the active site differ for different enzymes

Answer 2

different enzymes have active sites of different shapes. only certain enzymes work on certain active sites. each enzyme works on one substrate and catalyses only 1 reaction

Question 3

what does it mean when an active site becomes denatured?

Answer 3

when the active site changes shape due to pH or temperature change so the substrate no longer fits

Question 4

what is the function of the active site?

Answer 4

holds the substrate molecules tightly in the right position for bonds to form

Question 5

why do enzymes only work on specific substrates?

Answer 5

because the shape of the active site only fits one type of molecule

Question 6

what is a lock and key diagram?

Answer 6

a diagram of an enzyme with a substrate in it’s active site