enzymes

Question 1

cofactor

Answer 1

Non-protein substance that has to be present to ensure that an enzyme catalysed reaction occurs

Question 2

coenzyme

Answer 2

small organic non-protein molecule which temporarily binds to active site

• Vitamin B3
• Vitamin B5

Question 3

prosthetic group

Answer 3

a cofactor which is permanently bound to an enzyme molecule by covalent bonds

Question 4

active site

Answer 4

indebted area on the surface of an enzyme molecule with a shape complimentary to that of a specific substrate molecule - where substrate bonds and undergoes a reaction

Question 5

catalyst

Answer 5

speeds up reaction rate and the protein itself remained unchanged and reusable

Question 6

substrate

Answer 6

molecule which is altered/ broken down by an enzyme - catalysed reaction

Question 7

VMAX

Answer 7

maximum rate at which enzyme catalysed reactions can occur

Question 8

catabolic

Answer 8

pathway when metabolites are broken down releasing energy

Question 9

anabolic

Answer 9

pathways when energy is used to synthesise metabolites (larger molecules from smaller ones)