Which enzyme joins two substrates?: (A) Lyase, (B) Ligase, (C) Isomerase, (D) Synthase
Answer is B. Ans. is 'b' i.e., LigaseAn enzyme which joins two substrates in an energy dependent process is called ligase.Ligases ligate or bind two compounds together by creating a new chemical bond. A source of energy is required, usually ATP, Example are synthatases, carboxylases.