Fill in the missing words: Enzymes are biological ___(i)___. They ___(ii)___ the rate of ___(iii)___ reactions in all living things, and allow them to occur more easily. They occur in ___(iv)___ and ___(v)___ cells. Without them we would not be able to ___(vi)___. (Marks available: 3) Answer Answer outline and marking scheme for question: 1 (i) catalysts (ii) increase (iii) chemical (iv) plant / animal (v) animal / plant (vi) live / survive