F4 Biology WS 08 ans

4 Enzyme and metabolism

WS 08

1.                                                                                                                                    

(a)    Substrate: X                                                                                            1m

Enzyme: Q                                                                                               1m

Products: Y and Z                                                                                    1m

(b)    Each enzyme catalyses one type of reaction only.                                  1m

(c)     The active site of an enzyme has a specific shape.                                 1m

It binds only to a particular type of substrate that fits into it.                           1m

(d)    The lock-and-key hypothesis                                                                  1m