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problem 1) prepare the formula for glucose.

problem 2) Complete the following paragraph

All cells contain ……. which are ……. and act as …..…. which ….…. chemical  reactions. The reactions do not  ….….the ….…. which can take part in further reactions.

problem 3) If the enzyme-controlled reaction normally takes place at 10ºC, in general terms how will the reaction be affected by 

(a) a fall in temperature to 2°C ,

(b) a rise in temperature to 20°C.

(c) a rise in temperature to 65°C?

problem 4) A protein-digesting enzyme when mixed with starch solution would

(a) have no action             

(b) produce amino acids   

(c) produce glucose

(d) digest the starch?

problem 5) prepare down the exs of chemical reactions which are catalysed by enzymes in the course of brewing. 

problem 6) What does the enzyme catalyse do?

problem 7) Substance A is being investigated to see if it is an enzyme. When substance A is mixed with substance B a reaction takes place. A control experiment is conducted using a sample of A which has been boiled.

(a) Why is boiling used as a control?

(b) If the reaction still worked after A had been boiled, what might be your interpretation?

problem 8) In the investigation to compare the rates at which starch is being broken down by an enzyme

(a) what test is used

(b) how do you know when the reaction is completed?

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