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Question

Which of the following statement(s) is/are true about the IUBMB system of classification of enzymes.

(i) International Union of Biology and Modern Biology

(ii) International Union of Biochemistry and Molecular Biology

(iii) International Union of Biology and Molecular Biology

(iv) International Union of Biochemistry and Modern Biology

This question was previously asked in
TNPSC Group 2 2026 Prelims Question Paper (01-Nov-2026)
The correct answer is

(ii) only

Enzymes are named and numbered under the EC number system maintained by the IUBMB, which divides all enzymes into classes such as oxidoreductases, transferases, hydrolases, lyases, isomerases, ligases and translocases.

The abbreviation IUBMB stands for the International Union of Biochemistry and Molecular Biology, so statement (ii) is the only correct expansion.

Statement (i) replaces both 'Biochemistry' and 'Molecular' with wrong words; statement (iii) wrongly reads 'Biology' for 'Biochemistry'; statement (iv) wrongly reads 'Modern Biology' for 'Molecular Biology'. Each of these is therefore false.

(ii) only option is correct.

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