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Biological catalysts are protein molecul...

Biological catalysts are protein molecules which
1. Speed up a chemical reaction
2. remain unchanged after reaction
3. function optimally at `37^(@)C`
4. do not have an enzymatic activity
Select the correct answer using the code given below.

A

1 only

B

1,2 and 3

C

2 and 3 only

D

1,3 and 4

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