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Question

The enzyme which has EC number 4.2.1.7 is assigned to which of the following classes of enzyme?

A
Hydrolases
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B
Lyases
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C
Isomerases
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D
Ligases
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Solution

The correct option is B Lyases
The EC number 4.2.1.7 is assigned to the enzyme named altronate dehydratase or D-altronate hydro-lyase. This enzyme catalyses the dehydration of D-altronate and results in the formation of 2-dehydroxy-3-deoxy-D-gluconate and water.
Thus, the answer is B, i.e., the enzyme which has EC number 4.2.1.7 is assigned to the class of Lyases.

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