Lecture 3: Enzymes Classification

Question 1

oxidoreductases

Answer 1

catalyse transfer of electrons or H+ atoms from one molecule to another

lactic acid dehydrogenase-oxideses lactic acid to formn pyruvic acid

Question 2

Hydrolases

Answer 2

catalysis hydrolysis reactions (bond cleavage involving transfer of a water molecule)

lysozyme

Question 3

transferases

Answer 3

• catalyses the movement of a functional group/chemical group

Question 4

lyases

Answer 4

catalyses splitting of compounds of C-C, C-N, C-O and C=C

Question 5

isomerases

Answer 5

• catalyses transfer of groups/atoms within the same molecule to form an isomer

Question 6

ligases or polymerase

Answer 6

catalyses join of 2 or more compounds together (C-C, C-N, C-O, C-S) by condensation reaction

Acetyl CoA synthetase- in Krebs cycle

Question 7

which enzymes require coenzymes

Answer 7

oxidoreductases, transferases, Hydrolases, Ligase or Polymerase