0 0 votes The activity of an enzyme is expressed in International Units (IU). However, the S.I unit for enzyme activity is Katal. One Katal is $1.66 \times {10^4}$ IU $60$ IU $6 \times {10^7}$ IU ${10^6}$ IU Biochemistry gate2012 enzyme enzyme-biotechnology biochemistry + – Milicevic3306 7.9k points answer comment Share Follow 0 reply Please log in or register to add a comment.