Match each item in Column I with one in Column II and select the correct match from the codes given:
Column I Column II
A. Lyases P. catalyse removal of groups from substrates
by mechanisms other than hydrolysis, leaving double bonds
B. Ligases Q. catalyse the linking together of 2 compounds
C. Transferases R. catalyse the transfer of a group other than hydrogen
between a pair of substrates
D. Isomerases S. catalyse inter-conversion of optical, geometric
or positional isomers

Codes:
A B C D
1. P Q R S
2. Q P R S
3. P Q S R
4. R R Q S
Subtopic:  Enzymes Classification |
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The enzymes that catalyse removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds are called as:
1. Oxidoreductases 2. Hydrolases    
3. Ligases         4. Lyases
Subtopic:  Enzymes Classification |
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Which group of enzymes catalyze the chemical reaction where there is linking together of two compounds? 
1. Lyases 
2. Transferases 
3. Isomerases 
4. Ligases 
Subtopic:  Enzymes Classification |
 90%
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